LeetCode All in One 题目讲解汇总(持续更新中...)

 

终于将LeetCode的大部分题刷完了,真是漫长的第一遍啊,估计很多题都忘的差不多了,这次开个题目汇总贴,并附上每道题目的解题连接,方便之后查阅吧~ 

博主还制作了一款 网页版APP,方便大家进行查阅,网址如下:

https://grandyang.com

对应的 Github 项目 的同步地址如下,欢迎大家关注点赞❤️

https://github.com/grandyang/leetcode

如果各位看官们,大神们发现了任何错误,或是代码无法通过OJ,或是有更好的解法,或是有任何疑问,意见和建议的话,请一定要在对应的帖子下面评论区留言告知博主啊(如果不方便注册博客园的话,可以下载下文提到的APP,在Feedback中给博主发邮件交流哈),同时也请大家踊跃地,大量地,盲目地提供各个题目的follow up一起讨论哈,多谢多谢,祝大家刷得愉快,刷得精彩,刷出美好未来~

欢迎加入博主的知识星球,博主将及时答疑解惑,并分享刷题经验与总结,快快加入吧~)

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('$' 代表锁住的题目, '*' 代表数据库类题目, '#' 代表脚本类题目, '~' 代表并行类题目,深色为 #f5f5dc,浅色为 #fffaf0。)

 

1352 Product of the Last K Numbers 50.20% Medium
1351 Count Negative Numbers in a Sorted Matrix 77.30% Easy
1350 Students With Invalid Departments *$  89.90% Easy
1349 Maximum Students Taking Exam 49.80% Hard
1348 Tweet Counts Per Frequency 44.00% Medium
1347 Minimum Number of Steps to Make Two Strings Anagram 78.00% Medium
1346 Check If N and Its Double Exist 36.70% Easy
1345 Jump Game IV 46.60% Hard
1344 Angle Between Hands of a Clock 63.40% Medium
1343 Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold 68.10% Medium
1342 Number of Steps to Reduce a Number to Zero 84.90% Easy
1341 Movie Rating * 43.80% Medium
1340 Jump Game V 62.60% Hard
1339 Maximum Product of Splitted Binary Tree 47.70% Medium
1338 Reduce Array Size to The Half 69.20% Medium
1337 The K Weakest Rows in a Matrix 71.40% Easy
1336 Number of Transactions per Visit * 48.10% Hard
1335 Minimum Difficulty of a Job Schedule 58.30% Hard
1334 Find the City With the Smallest Number of Neighbors at a Threshold Distance 57.70% Medium
1333 Filter Restaurants by Vegan-Friendly, Price and Distance 60.50% Medium
1332 Remove Palindromic Subsequences 76.20% Easy
1331 Rank Transform of an Array 59.80% Easy
1330 Reverse Subarray To Maximize Array Value 41.30% Hard
1329 Sort the Matrix Diagonally 83.00% Medium
1328 Break a Palindrome 52.10% Medium
1327 List the Products Ordered in a Period * 71.90% Easy
1326 Minimum Number of Taps to Open to Water a Garden 51.60% Hard
1325 Delete Leaves With a Given Value 74.40% Medium
1324 Print Words Vertically 62.40% Medium
1323 Maximum 69 Number 82.00% Easy
1322 Ads Performance *$  60.10% Easy
1321 Restaurant Growth * 53.40% Medium
1320 Minimum Distance to Type a Word Using Two Fingers 59.80% Hard
1319 Number of Operations to Make Network Connected 58.50% Medium
1318 Minimum Flips to Make a OR b Equal to c 66.00% Medium
1317 Convert Integer to the Sum of Two No-Zero Integers 56.00% Easy
1316 Distinct Echo Substrings 49.70% Hard
1315 Sum of Nodes with Even-Valued Grandparent 85.60% Medium
1314 Matrix Block Sum 75.40% Medium
1313 Decompress Run-Length Encoded List 85.90% Easy
1312 Minimum Insertion Steps to Make a String Palindrome 65.70% Hard
1311 Get Watched Videos by Your Friends 45.90% Medium
1310 XOR Queries of a Subarray 72.20% Medium
1309 Decrypt String from Alphabet to Integer Mapping 79.50% Easy
1308 Running Total for Different Genders *$ 88.20% Medium
1307 Verbal Arithmetic Puzzle 34.80% Hard
1306 Jump Game III 63.10% Medium
1305 All Elements in Two Binary Search Trees 79.80% Medium
1304 Find N Unique Integers Sum up to Zero 77.10% Easy
1303 Find the Team Size *$ 90.80% Easy
1302 Deepest Leaves Sum 86.90% Medium
1301 Number of Paths with Max Score 38.70% Hard
1300 Sum of Mutated Array Closest to Target 43.10% Medium
1299 Replace Elements with Greatest Element on Right Side 74.70% Easy
1298 Maximum Candies You Can Get from Boxes 60.90% Hard
1297 Maximum Number of Occurrences of a Substring 52.00% Medium
1296 Divide Array in Sets of K Consecutive Numbers 56.60% Medium
1295 Find Numbers with Even Number of Digits 77.00% Easy
1294 Weather Type in Each Country *$ 68.0% Easy
1293 Shortest Path in a Grid with Obstacles Elimination 45.60% Hard
1292 Maximum Side Length of a Square with Sum Less than or Equal to Threshold 52.10% Medium
1291 Sequential Digits 60.90% Medium
1290 Convert Binary Number in a Linked List to Integer 82.70% Easy
1289 Minimum Falling Path Sum II 61.20% Hard
1288 Remove Covered Intervals 57.40% Medium
1287 Element Appearing More Than 25% In Sorted Array 59.50% Easy
1286 Iterator for Combination 73.20% Medium
1285 Find the Start and End Number of Continuous Ranges *$ 88.30% Medium
1284 Minimum Number of Flips to Convert Binary Matrix to Zero Matrix 72.00% Hard
1283 Find the Smallest Divisor Given a Threshold 53.70% Medium
1282 Group the People Given the Group Size They Belong To 85.20% Medium
1281 Subtract the Product and Sum of Digits of an Integer 86.30% Easy
1280 Students and Examinations *$ 74.60% Easy
1279 Traffic Light Controlled Intersection ~$ 75.30% Easy
1278 Palindrome Partitioning III 60.90% Hard
1277 Count Square Submatrices with All Ones 74.20% Medium
1276 Number of Burgers with No Waste of Ingredients 50.60% Medium
1275 Find Winner on a Tic Tac Toe Game 54.90% Easy
1274 Number of Ships in a Rectangle $ 68.60% Hard
1273 Delete Tree Nodes $ 61.20% Medium
1272 Remove Interval $ 61.10% Medium
1271 Hexspeak $ 56.30% Easy
1270 All People Report to the Given Manager *$ 88.10% Medium
1269 Number of Ways to Stay in the Same Place After Some Steps 43.40% Hard
1268 Search Suggestions System 65.40% Medium
1267 Count Servers that Communicate 58.30% Medium
1266 Minimum Time Visiting All Points 79.20% Easy
1265 Print Immutable Linked List in Reverse $ 94.30% Medium
1264 Page Recommendations *$ 67.70% Medium
1263 Minimum Moves to Move a Box to Their Target Location  48.30% Hard
1262 Greatest Sum Divisible by Three 50.80% Medium
1261 Find Elements in a Contaminated Binary Tree 75.70% Medium
1260 Shift 2D Grid 62.10% Easy
1259 Handshakes That Don't Cross $ 54.40% Hard
1258 Synonymous Sentences $ 57.40% Medium
1257 Smallest Common Region $ 62.10% Medium
1256 Encode Number $  69.00% Medium
1255 Maximum Score Words Formed by Letters 71.30% Hard
1254 Number of Closed Islands 62.70% Medium
1253 Reconstruct a 2-Row Binary Matrix 42.70% Medium
1252 Cells with Odd Values in a Matrix  78.50% Easy
1251 Average Selling Price *$ 83.20% Easy
1250 Check If It Is a Good Array 57.50% Hard
1249 Minimum Remove to Make Valid Parentheses 65.00% Medium
1248 Count Number of Nice Subarrays 57.60% Medium
1247 Minimum Swaps to Make Strings Equal 63.60% Medium
1246 Palindrome Removal $ 45.80% Hard
1245 Tree Diameter $ 62.00% Medium
1244 Design A Leaderboard $ 67.30% Medium
1243 Array Transformation $ 50.10% Easy
1242 Web Crawler Multithreaded ~$ 48.20% Medium
1241 Number of Comments per Post *$ 68.00% Easy
1240 Tiling a Rectangle with the Fewest Squares 52.40% Hard
1239 Maximum Length of a Concatenated String with Unique Characters 50.70% Medium
1238 Circular Permutation in Binary Representation 67.90% Medium
1237 Find Positive Integer Solution for a Given Equation 69.70% Medium
1236 Web Crawler $ 65.40% Medium
1235 Maximum Profit in Job Scheduling 50.50% Hard
1234 Replace the Substring for Balanced String 35.50% Medium
1233 Remove Sub-Folders from the Filesystem 64.50% Medium
1232 Check If It Is a Straight Line 42.30% Easy
1231 Divide Chocolate $ 55.50% Hard
1230 Toss Strange Coins $ 50.80% Medium
1229 Meeting Scheduler $ 54.70% Medium
1228 Missing Number In Arithmetic Progression $ 51.20% Medium
1227 Airplane Seat Assignment Probability 63.00% Medium
1226 The Dining Philosophers ~ 60.20% Medium
1225 Report Contiguous Dates * 63.80% Hard
1224 Maximum Equal Frequency 36.20% Hard
1223 Dice Roll Simulation 47.40% Hard
1222 Queens That Can Attack the King  70.20% Medium
1221 Split a String in Balanced Strings 84.60% Easy
1220 Count Vowels Permutation  56.60% Hard
1219 Path with Maximum Gold 66.10% Medium
1218 Longest Arithmetic Subsequence of Given Difference 48.10% Medium
1217 Minimum Cost to Move Chips to The Same Position 70.70% Easy
1216 Valid Palindrome III $ 50.80% Hard
1215 Stepping Numbers $ 44.60% Medium
1214 Two Sum BSTs $ 67.30% Medium
1213 Intersection of Three Sorted Arrays $ 79.80% Easy
1212 Team Scores in Football Tournament * 57.00% Medium
1211 Queries Quality and Percentage * 70.40% Easy
1210 Minimum Moves to Reach Target with Rotations 47.50% Hard
1209 Remove All Adjacent Duplicates in String II 56.40% Medium
1208 Get Equal Substrings Within Budget 45.30% Medium
1207 Unique Number of Occurrences  72.40% Easy
1206 Design Skiplist 59.60% Hard
1205 Monthly Transactions II * 45.30% Medium
1204 Last Person to Fit in the Bus * 73.00% Medium
1203 Sort Items by Groups Respecting Dependencies  48.80% Hard 
1202 Smallest String With Swaps 50.50% Medium
1201 Ugly Number III 27.20% Medium
1200 Minimum Absolute Difference 67.30% Easy
1199 Minimum Time to Build Blocks $ 39.40% Hard
1198 Find Smallest Common Element in All Rows $ 76.30% Medium
1197 Minimum Knight Moves $ 38.60% Medium
1196 How Many Apples Can You Put into the Basket $ 68.30% Easy
1195 Fizz Buzz Multithreaded ~ 71.40% Medium
1194 Tournament Winners * 52.70% Hard
1193 Monthly Transactions I * 68.70% Medium
1192 Critical Connections in a Network 51.80% Hard
1191 K-Concatenation Maximum Sum 24.60% Medium
1190 Reverse Substrings Between Each Pair of Parentheses 65.00% Medium
1189 Maximum Number of Balloons 62.00% Easy
1188 Design Bounded Blocking Queue ~ 73.20% Medium
1187 Make Array Strictly Increasing 43.80% Hard
1186 Maximum Subarray Sum with One Deletion 39.80% Medium
1185 Day of the Week 59.90% Easy
1184 Distance Between Bus Stops 53.90% Easy
1183 Maximum Number of Ones $ 58.70% Hard
1182 Shortest Distance to Target Color $ 54.30% Medium
1181 Before and After Puzzle $ 44.70% Medium
1180 Count Substrings with Only One Distinct Letter $ 78.30% Easy
1179 Reformat Department Table * 82.10% Easy 
1178 Number of Valid Words for Each Puzzle 40.80% Hard
1177 Can Make Palindrome from Substring 36.50% Medium
1176 Diet Plan Performance $ 53.50% Easy
1175 Prime Arrangements 51.90% Medium
1174 Immediate Food Delivery II * 63.10% Medium
1173 Immediate Food Delivery I * 83.10% Easy
1172 Dinner Plate Stacks 36.40% Hard
1171 Remove Zero Sum Consecutive Nodes from Linked List 41.90% Medium
1170 Compare Strings by Frequency of the Smallest Character 60.60% Medium
1169 Invalid Transactions 30.40% Medium
1168 Optimize Water Distribution in a Village $ 62.30% Hard
1167 Minimum Cost to Connect Sticks $ 65.70% Medium
1166 Design File System $ 59.00% Medium
1165 Single-Row Keyboard $ 85.50% Easy
1164 Product Price at a Given Date * 69.00% Medium
1163 Last Substring in Lexicographical Order 36.00% Hard
1162 As Far from Land as Possible 46.60% Medium
1161 Maximum Level Sum of a Binary Tree 67.50% Medium
1160 Find Words That Can Be Formed by Characters 67.80% Easy
1159 Market Analysis II * 57.00% Hard
1158 Market Analysis I * 65.00% Medium
1157 Online Majority Element In Subarray 41.60% Hard
1156 Swap For Longest Repeated Character Substring 47.20% Medium
1155 Number of Dice Rolls With Target Sum 47.70% Medium
1154 Day of the Year 50.10% Easy
1153 String Transforms Into Another String $ 35.60% Hard
1152 Analyze User Website Visit Pattern $ 43.20% Medium
1151 Minimum Swaps to Group All 1's Together $ 51.90% Medium
1150 Check If a Number Is Majority Element in a Sorted Array $ 57.10% Easy
1149 Article Views II *$ 48.20% Medium
1148 Article Views I *$  77.10% Easy
1147 Longest Chunked Palindrome Decomposition 59.80% Hard
1146 Snapshot Array 37.00% Medium
1145 Binary Tree Coloring Game 51.10% Medium
1144 Decrease Elements To Make Array Zigzag 46.50% Medium
1143 Longest Common Subsequence 58.80% Medium
1142 User Activity for the Past 30 Days II *$ 35.50% Easy
1141 User Activity for the Past 30 Days I *$ 54.60% Easy
1140 Stone Game II 64.60% Medium
1139 Largest 1-Bordered Square 48.70% Medium
1138 Alphabet Board Path 51.60% Medium
1137 N-th Tribonacci Number 55.70% Easy
1136 Parallel Courses $ 60.70% Medium
1135 Connecting Cities With Minimum Cost $ 60.00% Easy
1134 Armstrong Number $ 78.50% Easy
1133 Largest Unique Number $ 67.20% Easy
1132 Reported Posts II *$  34.40% Medium
1131 Maximum of Absolute Value Expression 51.30% Medium
1130 Minimum Cost Tree From Leaf Values 67.40% Medium
1129 Shortest Path with Alternating Colors 40.70% Medium
1128 Number of Equivalent Domino Pairs 45.90% Easy
1127 User Purchase Platform *$ 50.80% Hard
1126 Active Businesses *$ 68.40% Medium
1125 Smallest Sufficient Team 47.20% Hard
1124 Longest Well-Performing Interval 33.50% Medium
1123 Lowest Common Ancestor of Deepest Leaves 68.50% Medium
1122 Relative Sort Array 67.90% Easy
1121 Divide Array Into Increasing Sequences $ 59.00% Hard
1120 Maximum Average Subtree $ 64.50% Medium
1119 Remove Vowels from a String $ 90.50% Easy
1118 Number of Days in a Month $ 57.30% Easy
1117 Building H2O ~ 53.10% Medium
1116 Print Zero Even Odd ~ 58.20% Medium
1115 Print FooBar Alternately ~ 59.00% Medium
1114 Print in Order ~ 67.60% Easy
1113 Reported Posts *$ 66.40% Medium
1112 Highest Grade For Each Student *$ 72.80% Medium
1111 Maximum Nesting Depth of Two Valid Parentheses Strings 72.70% Medium
1110 Delete Nodes And Return Forest 68.00% Medium
1109 Corporate Flight Bookings  54.30% Medium
1108 Defanging an IP Address  88.40% Easy
1107 New Users Daily Count *$ 46.10% Medium
1106 Parsing A Boolean Expression 59.50% Hard
1105 Filling Bookcase Shelves     57.50% Medium
1104 Path In Zigzag Labelled Binary Tree 73.50% Medium
1103 Distribute Candies to People 63.40% Easy
1102 Path With Maximum Minimum Value $ 51.00% Medium
1101 The Earliest Moment When Everyone Become Friends $ 67.80% Medium
1100 Find K-Length Substrings With No Repeated Characters $ 73.10% Medium
1099 Two Sum Less Than K $ 60.80% Easy
1098 Unpopular Books *$
45.50% Medium
1097 Game Play Analysis V *$  57.00% Hard
1096 Brace Expansion II  62.90% Hard
1095 Find in Mountain Array  36.10% Hard
1094 Car Pooling 59.70% Medium
1093 Statistics from a Large Sample 48.50% Medium
1092 Shortest Common Supersequence 53.40% Hard
1091 Shortest Path in Binary Matrix 40.30% Medium
1090 Largest Values From Labels 60.10% Medium
1089 Duplicate Zeros 51.60% Easy
1088 Confusing Number II 45.60% Hard
1087 Brace Expansion $ 63.20% Medium
1086 High Five $ 77.50% Easy
1085 Sum of Digits in the Minimum Number $  75.10% Easy
1084 Sales Analysis III *$ 54.80% Easy 
1083 Sales Analysis II *$ 50.80% Easy
1082 Sales Analysis I *$ 73.90% Easy 
1081 Smallest Subsequence of Distinct Characters 53.60% Medium
1080 Insufficient Nodes in Root to Leaf Paths 50.10% Medium
1079 Letter Tile Possibilities 75.90% Medium
1078 Occurrences After Bigram 65.00% Easy
1077 Project Employees III *$ 78.00% Medium
1076 Project Employees II *$ 52.80% Easy
1075 Project Employees I *$ 66.20% Easy
1074 Number of Submatrices That Sum to Target 62.00% Hard
1073 Adding Two Negabinary Numbers 34.80% Medium
1072 Flip Columns For Maximum Number of Equal Rows 61.60% Medium
1071 Greatest Common Divisor of Strings 51.50% Easy
1070 Product Sales Analysis III *$ 49.90% Medium
1069 Product Sales Analysis II *$ 83.30% Easy
1068 Product Sales Analysis I *$ 82.10% Easy
1067 Digit Count in Range $ 41.60% Hard
1066 Campus Bikes II $ 54.20% Medium
1065 Index Pairs of a String $ 61.00% Easy
1064 Fixed Point $ 64.90% Easy
1063 Number of Valid Subarrays $ 72.10% Hard
1062 Longest Repeating Substring $ 58.40% Medium
1061 Lexicographically Smallest Equivalent String $ 66.90% Medium
1060 Missing Element in Sorted Array $ 54.80% Medium
1059 All Paths from Source Lead to Destination $ 43.00% Medium
1058 Minimize Rounding Error to Meet Target $ 43.70% Medium
1057 Campus Bikes $  57.80% Medium
1056 Confusing Number $ 47.00% Easy
1055 Shortest Way to Form String $ 57.20% Medium
1054 Distant Barcodes 44.20% Medium
1053 Previous Permutation With One Swap 51.20% Medium
1052 Grumpy Bookstore Owner 55.90% Medium
1051 Height Checker 72.10% Easy
1050 Actors and Directors Who Cooperated At Least Three Times *$ 72.40% Easy
1049 Last Stone Weight II 45.40% Medium
1048 Longest String Chain 55.50% Medium
1047 Remove All Adjacent Duplicates In String  70.90% Easy
1046 Last Stone Weight  62.40% Easy
1045 Customers Who Bought All Products *$ 68.40% Medium
1044 Longest Duplicate Substring 31.40% Hard 
1043 Partition Array for Maximum Sum 67.10% Medium
1042 Flower Planting With No Adjacent 48.80% Medium
1041 Robot Bounded In Circle 55.00% Medium
1040 Moving Stones Until Consecutive II 54.10% Medium
1039 Minimum Score Triangulation of Polygon 50.10% Medium
1038 Binary Search Tree to Greater Sum Tree  82.30% Medium
1037 Valid Boomerang 37.80% Easy
1036 Escape a Large Maze 34.50% Hard
1035 Uncrossed Lines 56.10% Medium
1034 Coloring A Border 45.70% Medium
1033 Moving Stones Until Consecutive 43.20% Easy
1032 Stream of Characters  48.60% Hard
1031 Maximum Sum of Two Non-Overlapping Subarrays 58.90% Medium
1030 Matrix Cells in Distance Order 66.90% Easy
1029 Two City Scheduling 57.90% Medium
1028 Recover a Tree From Preorder Traversal 70.90% Hard
1027 Longest Arithmetic Subsequence 49.80% Medium
1026 Maximum Difference Between Node and Ancestor
69.40% Medium
1025 Divisor Game 66.20% Easy
1024 Video Stitching  49.00% Medium
1023 Camelcase Matching 57.40% Medium
1022 Sum of Root To Leaf Binary Numbers 71.50% Easy 
1021 Remove Outermost Parentheses 79.00% Easy
1020 Number of Enclaves 58.90% Medium
1019 Next Greater Node In Linked List 58.20% Medium
1018 Binary Prefix Divisible By 5 47.80% Easy
1017 Convert to Base -2 59.60% Medium
1016 Binary String With Substrings Representing 1 To N
58.90% Medium
1015 Smallest Integer Divisible by K 41.80% Medium
1014 Best Sightseeing Pair  52.90% Medium
1013 Partition Array Into Three Parts With Equal Sum 49.10% Easy
1012 Numbers With Repeated Digits 37.80% Hard
1011 Capacity To Ship Packages Within D Days 59.70% Medium
1010 Pairs of Songs With Total Durations Divisible by 60 50.10% Medium
1009 Complement of Base 10 Integer 61.50% Easy
1008 Construct Binary Search Tree from Preorder Traversal 78.80% Medium
1007 Minimum Domino Rotations For Equal Row  50.90% Medium
1006 Clumsy Factorial
53.70% Medium
1005 Maximize Sum Of Array After K Negations  52.40% Easy
1004 Max Consecutive Ones III 60.50% Medium
1003 Check If Word Is Valid After Substitutions  56.10% Medium
1002 Find Common Characters  68.10% Easy
1001 Grid Illumination 36.60% Hard
1000 Minimum Cost to Merge Stones  40.40% Hard
999 Available Captures for Rook 66.80% Easy
998 Maximum Binary Tree II 63.70% Medium
997 Find the Town Judge 49.80% Easy
996 Number of Squareful Arrays  48.00% Hard
995 Minimum Number of K Consecutive Bit Flips 49.60% Hard
994 Rotting Oranges 49.60% Medium
993 Cousins in Binary Tree 52.20% Easy
992 Subarrays with K Different Integers 50.40% Hard
991 Broken Calculator 46.40% Medium
990 Satisfiability of Equality Equations 46.50% Medium
989 Add to Array-Form of Integer 44.70% Easy
988 Smallest String Starting From Leaf 46.60% Medium
987 Vertical Order Traversal of a Binary Tree 37.60% Medium
986 Interval List Intersections  68.10% Medium
985 Sum of Even Numbers After Queries 60.70% Easy
984 String Without AAA or BBB 38.50% Medium
983 Minimum Cost For Tickets 62.60% Medium
982 Triples with Bitwise AND Equal To Zero 56.10% Hard
981 Time Based Key-Value Store
54.00% Medium
980 Unique Paths III 77.10% Hard
979 Distribute Coins in Binary Tree 69.30% Medium
978 Longest Turbulent Subarray  46.60% Medium
977 Squares of a Sorted Array 72.40% Easy
976 Largest Perimeter Triangle 58.50% Easy
975 Odd Even Jump 41.70% Hard
974 Subarray Sums Divisible by K 50.30% Medium
973 K Closest Points to Origin 64.40% Medium
972 Equal Rational Numbers 41.80% Hard
971 Flip Binary Tree To Match Preorder Traversal
46.10% Medium
970 Powerful Integers  39.90% Easy
969 Pancake Sorting  68.40% Medium
968 Binary Tree Cameras  38.40% Hard
967 Numbers With Same Consecutive Differences 44.30% Medium
966 Vowel Spellchecker 47.70% Medium
965 Univalued Binary Tree 67.60% Easy
964 Least Operators to Express Number  44.70% Hard
963 Minimum Area Rectangle II 51.60% Medium
962 Maximum Width Ramp
46.00% Medium
961 N-Repeated Element in Size 2N Array 74.20% Easy 
960 Delete Columns to Make Sorted III  54.00% Hard 
959 Regions Cut By Slashes 66.70% Medium
958 Check Completeness of a Binary Tree 52.30% Medium
957 Prison Cells After N Days 40.30% Medium
956 Tallest Billboard  39.70% Hard 
955 Delete Columns to Make Sorted II 33.40% Medium
954 Array of Doubled Pairs  35.30% Medium 
953 Verifying an Alien Dictionary  52.90%  Easy 
952 Largest Component Size by Common Factor  36.00% Hard 
951 Flip Equivalent Binary Trees
65.50% Medium 
950 Reveal Cards In Increasing Order  75.00% Medium 
949 Largest Time for Given Digits  36.30% Medium 
948 Bag of Tokens 46.20% Medium 
947 Most Stones Removed with Same Row or Column 55.30% Medium 
946 Validate Stack Sequences 63.10% Medium 
945 Minimum Increment to Make Array Unique 46.50%  Medium 
944 Delete Columns to Make Sorted 70.90% Easy 
943 Find the Shortest Superstring 43.20% Hard 
942 DI String Match 73.20% Easy 
941 Valid Mountain Array
32.20% Easy 
940 Distinct Subsequences II 41.50% Hard
939 Minimum Area Rectangle 52.00% Medium
938 Range Sum of BST 79.90% Easy
937 Reorder Data in Log Files  53.70% Easy
936 Stamping The Sequence 38.10% Hard
935 Knight Dialer  43.80% Medium
934 Shortest Bridge 46.50% Medium
933 Number of Recent Calls  70.90% Easy
932 Beautiful Array
57.10% Medium
931 Minimum Falling Path Sum 61.30% Medium
930 Binary Subarrays With Sum 41.40% Medium
929 Unique Email Addresses   67.60% Easy
928 Minimize Malware Spread II  40.10% Hard
927 Three Equal Parts 32.80% Hard
926 Flip String to Monotone Increasing   51.60% Medium
925 Long Pressed Name  45.00% Easy
924 Minimize Malware Spread  41.70%  Hard
923 3Sum With Multiplicity  35.30% Medium
922 Sort Array By Parity II   68.30% Easy
921 Minimum Add to Make Parentheses Valid  72.30% Medium
920 Number of Music Playlists
45.70% Hard
919 Complete Binary Tree Inserter 55.70% Medium
918 Maximum Sum Circular Subarray 33.20% Medium
917 Reverse Only Letters 56.30% Easy
916 Word Subsets 45.90% Medium
915 Partition Array into Disjoint Intervals 43.90% Medium
914 X of a Kind in a Deck of Cards 34.00%  Easy
913 Cat and Mouse 29.90% Hard
912 Sort an Array 62.90% Medium
911 Online Election 48.30% Medium
910 Smallest Range II 24.90% Medium
909 Snakes and Ladders 36.10% Easy
908 Smallest Range I 65.00% Easy
907 Sum of Subarray Minimums  29.40% Medium
906 Super Palindromes 30.80% Hard
905 Sort Array By Parity 72.60% Easy
904 Fruit Into Baskets 41.70% Medium
903 Valid Permutations for DI Sequence 45.10% Hard
902 Numbers At Most N Given Digit Set  28.80% Hard
901 Online Stock Span 49.90% Medium
900 RLE Iterator  50.50% Medium
899 Orderly Queue 47.70% Hard
898 Bitwise ORs of Subarrays 34.70% Medium
897 Increasing Order Search Tree 65.20% Easy
896 Monotonic Array 55.40% Easy
895 Maximum Frequency Stack 56.70% Hard
894 All Possible Full Binary Trees 71.30% Medium
893 Groups of Special-Equivalent Strings  63.00% Easy
892 Surface Area of 3D Shapes 56.10% Easy
891 Sum of Subsequence Widths 29.20% Hard
890 Find and Replace Pattern 71.30% Medium
889 Construct Binary Tree from Preorder and Postorder Traversal 60.70% Medium
888 Fair Candy Swap 56.90%  Easy
887 Super Egg Drop  24.90% Hard
886 Possible Bipartition 40.90% Medium
885 Spiral Matrix III  64.80% Medium
884 Uncommon Words from Two Sentences  60.90%  Easy
883 Projection Area of 3D Shapes 65.90% Easy
882 Reachable Nodes In Subdivided Graph 38.20% Hard
881 Boats to Save People
44.10% Medium
880 Decoded String at Index 23.00% Medium
879 Profitable Schemes 36.20% Hard
878 Nth Magical Number  25.40% Hard
877 Stone Game  61.10% Medium
876 Middle of the Linked List  63.80% Easy
875 Koko Eating Bananas  45.90% Medium
874 Walking Robot Simulation  31.70% Easy
873 Length of Longest Fibonacci Subsequence  46.00% Medium
872 Leaf-Similar Trees  63.10% Easy
871 Minimum Number of Refueling Stops  28.70% Hard
870 Advantage Shuffle  42.20% Medium
869 Reordered Power of 2  50.60% Medium
868 Binary Gap 59.30% Easy
867 Transpose Matrix  63.90% Easy
866 Prime Palindrome   20.00% Medium
865 Smallest Subtree with all the Deepest Nodes 55.40% Medium
864 Shortest Path to Get All Keys  35.70% Hard
863 All Nodes Distance K in Binary Tree  46.80% Medium
862 Shortest Subarray with Sum at Least K  22.00% Hard
861 Score After Flipping Matrix 69.30% Medium
860 Lemonade Change 50.20% Easy
859 Buddy Strings 27.60% Easy
858 Mirror Reflection 52.00% Medium
857 Minimum Cost to Hire K Workers 47.30% Hard
856 Score of Parentheses  55.90% Medium
855 Exam Room 38.10% Medium
854 K-Similar Strings 33.20% Hard
853 Car Fleet   39.30% Medium
852 Peak Index in a Mountain Array   68.50% Easy
851 Loud and Rich     47.40% Medium
850 Rectangle Area II  44.00% Hard
849 Maximize Distance to Closest Person 40.40% Easy
848 Shifting Letters  39.90% Medium
847 Shortest Path Visiting All Nodes   45.90% Hard
846 Hand of Straights
48.60% Medium
845 Longest Mountain in Array 34.00% Medium
844 Backspace String Compare 45.50% Easy
843 Guess the Word   42.60% Hard
842 Split Array into Fibonacci Sequence 34.60% Medium
841 Keys and Rooms
59.70% Medium
840 Magic Squares In Grid 35.10% Easy
839 Similar String Groups 33.50% Hard
838 Push Dominoes 42.80% Medium
837 New 21 Game 29.50% Medium
836 Rectangle Overlap 45.50% Easy
835 Image Overlap 50.30% Medium
834 Sum of Distances in Tree 38.10% Hard
833 Find And Replace in String 44.50% Medium
832 Flipping an Image   71.30% Easy
831 Masking Personal Information 41.50% Medium
830 Positions of Large Groups 47.40% Easy
829 Consecutive Numbers Sum  32.10% Hard
828 Unique Letter String 38.10% Hard
827 Making A Large Island 42.10% Hard
826 Most Profit Assigning Work 34.70% Medium
825 Friends Of Appropriate Ages 35.00% Medium
824 Goat Latin 56.70% Easy
823 Binary Trees With Factors  31.50% Medium
822 Card Flipping Game 39.70% Medium
821 Shortest Distance to a Character 62.60% Easy
820 Short Encoding of Words    46.00% Medium
819 Most Common Word  41.50% Easy
818 Race Car
34.00% Hard
817 Linked List Components  51.90% Medium
816 Ambiguous Coordinates  42.40% Medium
815 Bus Routes  36.10% Hard
814 Binary Tree Pruning 68.30% Medium
813 Largest Sum of Averages 42.40% Medium
812 Largest Triangle Area  53.80% Easy
811 Subdomain Visit Count   61.50% Easy
810 Chalkboard XOR Game
41.90% Hard
809 Expressive Words 39.50% Medium
808 Soup Servings 33.60% Medium
807 Max Increase to Keep City Skyline 79.60% Medium
806 Number of Lines To Write String  62.10% Easy
805 Split Array With Same Average  21.00% Hard
804 Unique Morse Code Words 71.30% Easy
803 Bricks Falling When Hit 22.90% Hard
802 Find Eventual Safe States  39.20% Medium
801 Minimum Swaps To Make Sequences Increasing  31.00%  Medium
800 Similar RGB Color $  54.50% Easy
799 Champagne Tower 29.90% Medium
798 Smallest Rotation with Highest Score  34.30% Hard
797 All Paths From Source to Target 67.40% Medium
796 Rotate String  49.60% Easy
795 Number of Subarrays with Bounded Maximum    41.60% Medium
794 Valid Tic-Tac-Toe State  27.80% Medium
793 Preimage Size of Factorial Zeroes Function     40.80% Hard
792 Number of Matching Subsequences
37.30% Medium
791 Custom Sort String  59.40% Medium
790 Domino and Tromino Tiling  32.80% Medium
789 Escape The Ghosts 51.00% Medium
788 Rotated Digits 51.00% Easy
787 Cheapest Flights Within K Stops  29.90% Medium
786 K-th Smallest Prime Fraction 32.50% Hard
785 Is Graph Bipartite? 38.50% Medium
784 Letter Case Permutation 53.00% Easy
783 Minimum Distance Between BST Nodes 47.80% Easy 
782 Transform to Chessboard 37.50% Hard
781 Rabbits in Forest  49.80% Medium
780 Reaching Points 23.90% Hard
779 K-th Symbol in Grammar 37.30% Medium
778 Swim in Rising Water  44.60% Hard
777 Swap Adjacent in LR String 28.90% Medium
776 Split BST $ 49.90% Medium
775 Global and Local Inversions  33.60% Medium
774 Minimize Max Distance to Gas Station $ 32.80% Hard
773 Sliding Puzzle 46.50% Hard
772 Basic Calculator III $
40.10% Hard
771 Jewels and Stones  81.90% Easy
770 Basic Calculator IV 42.10% Hard
769 Max Chunks To Make Sorted 48.00% Medium
768 Max Chunks To Make Sorted II 43.20% Hard
767 Reorganize String 36.50%  Medium
766 Toeplitz Matrix 57.90% Easy
765 Couples Holding Hands 48.50% Hard
764 Largest Plus Sign 39.20% Medium
763 Partition Labels 64.10% Medium
762 Prime Number of Set Bits in Binary Representation 55.00% Easy
761 Special Binary String  41.00% Hard
760 Find Anagram Mappings $ 75.60% Easy
759 Employee Free Time $ 51.90% Hard
758 Bold Words in String $ 37.90% Easy
757 Set Intersection Size At Least Two 34.60% Hard
756 Pyramid Transition Matrix  45.50% Medium
755 Pour Water $ 34.00% Medium
754 Reach a Number 26.10% Medium
753 Cracking the Safe   39.70% Hard
752 Open the Lock
38.20% Medium
751 IP to CIDR $ 54.80% Easy
750 Number Of Corner Rectangles $ 51.00%  Medium
749 Contain Virus 39.60% Hard
748 Shortest Completing Word 53.50% Medium
747 Largest Number At Least Twice of Others  42.60% Easy
746 Min Cost Climbing Stairs 43.60% Easy 
745 Prefix and Suffix Search 24.50% Hard
744 Find Smallest Letter Greater Than Target
45.30% Easy
743 Network Delay Time 34.30% Medium
742 Closest Leaf in a Binary Tree $ 33.20% Medium
741 Cherry Pickup 22.50% Hard
740 Delete and Earn  42.60% Medium
739 Daily Temperatures 53.50% Medium
738 Monotone Increasing Digits  41.80%  Medium
737 Sentence Similarity II $ 41.20%  Medium
736 Parse Lisp Expression  42.00% Hard
735 Asteroid Collision 37.60% Medium
734 Sentence Similarity $ 38.60%  Easy
733 Flood Fill 49.30% Easy
732 My Calendar III 51.30% Hard
731 My Calendar II 35.00% Medium
730 Count Different Palindromic Subsequences 32.40% Hard
729 My Calendar I 40.10% Medium
728 Self Dividing Numbers 68.50% Easy
727 Minimum Window Subsequence $ 30.10% Hard
726 Number of Atoms 45.00% Hard
725 Split Linked List in Parts 50.00% Medium
724 Find Pivot Index 41.00% Easy
723 Candy Crush $ 56.10% Medium
722 Remove Comments 26.30% Medium
721 Accounts Merge 29.60% Medium
720 Longest Word in Dictionary 40.60% Easy
719 Find K-th Smallest Pair Distance 26.10% Hard
718 Maximum Length of Repeated Subarray 39.90% Medium
717 1-bit and 2-bit Characters 50.90% Easy
716 Max Stack $ 35.50% Hard
715 Range Module 31.00% Hard
714 Best Time to Buy and Sell Stock with Transaction Fee 41.60% Medium
713 Subarray Product Less Than K 32.90% Medium
712 Minimum ASCII Delete Sum for Two Strings 50.90% Medium
711 Number of Distinct Islands II $ 39.40% Hard
710 Random Pick with Blacklist  29.80% Hard
709 To Lower Case    74.50% Easy
708 Insert into a Cyclic Sorted List $ 25.50% Medium
707 Design Linked List      19.10% Easy
706 Design HashMap  49.10% Easy
705 Design HashSet    43.60% Easy
704 Binary Search 40.10% Easy
703 Kth Largest Element in a Stream  39.60% Easy
702 Search in a Sorted Array of Unknown Size $ 43.00% Medium
701 Insert into a Binary Search Tree 67.90% Medium
700 Search in a Binary Search Tree 62.70% Easy
699 Falling Squares 36.80% Hard
698 Partition to K Equal Sum Subsets 35.60% Medium
697 Degree of an Array 47.90% Easy
696 Count Binary Substrings 51.90% Easy
695 Max Area of Island  53.30% Easy
694 Number of Distinct Islands $ 43.90% Medium
693 Binary Number with Alternating Bits 54.20% Easy
692 Top K Frequent Words 41.70% Medium
691 Stickers to Spell Word 32.30% Hard
690 Employee Importance 53.60% Easy
689 Maximum Sum of 3 Non-Overlapping Subarrays 41.70% Hard
688 Knight Probability in Chessboard  38.90% Medium
687 Longest Univalue Path  32.90% Easy
686 Repeated String Match  31.70% Easy
685 Redundant Connection II 28.40% Hard
684 Redundant Connection 37.40% Medium
683 K Empty Slots $ 37.00% Hard
682 Baseball Game 58.60% Easy
681 Next Closest Time $ 43.00% Medium
680 Valid Palindrome II 31.10% Easy
679 24 Game 38.30%  Hard
678 Valid Parenthesis String 28.30% Medium
677 Map Sum Pairs  53.80% Medium
676 Implement Magic Dictionary 50.70% Medium
675 Cut Off Trees for Golf Event 27.20% Hard
674 Longest Continuous Increasing Subsequence 43.20% Easy
673 Number of Longest Increasing Subsequence 30.80% Medium
672 Bulb Switcher II 47.60% Medium
671 Second Minimum Node In a Binary Tree  42.30% Easy
670 Maximum Swap 38.40% Medium
669 Trim a Binary Search Tree 58.70% Easy
668 Kth Smallest Number in Multiplication Table  36.30% Hard
667 Beautiful Arrangement II 51.50% Medium
666 Path Sum IV $ 48.90% Medium
665 Non-decreasing Array 21.20%  Easy
664 Strange Printer 31.10% Hard
663 Equal Tree Partition $ 36.70% Medium
662 Maximum Width of Binary Tree 37.00% Medium
661 Image Smoother 46.60% Easy
660 Remove 9 $ 46.10% Hard
659 Split Array into Consecutive Subsequences 39.40% Medium
658 Find K Closest Elements 36.30% Medium
657 Judge Route Circle 69.30% Easy
656 Coin Path $ 24.60% Hard
655 Print Binary Tree 50.80% Medium
654 Maximum Binary Tree 70.80% Medium
653 Two Sum IV - Input is a BST 50.60% Easy
652 Find Duplicate Subtrees 33.20% Medium
651 4 Keys Keyboard $ 46.70% Medium
650 2 Keys Keyboard 42.70% Medium
649 Dota2 Senate  35.60% Medium
648 Replace Words 48.40% Medium
647 Palindromic Substrings 55.70% Medium
646 Maximum Length of Pair Chain 47.40% Medium
645 Set Mismatch 40.40% Easy
644 Maximum Average Subarray II $ 20.30% Hard
643 Maximum Average Subarray I 38.40% Easy
642 Design Search Autocomplete System $ 29.40% Hard
641 Design Circular Deque    48.00% Medium
640 Solve the Equation 39.00% Medium
639 Decode Ways II 22.80% Hard
638 Shopping Offers 41.50% Medium
637 Average of Levels in Binary Tree 55.60% Easy
636 Exclusive Time of Functions 40.30% Medium
635 Design Log Storage System $ 47.70% Medium
634 Find the Derangement of An Array $ 32.70% Medium
633 Sum of Square Numbers 31.60%  Easy
632 Smallest Range 42.80% Hard
631 Design Excel Sum Formula $ 25.60% Hard
630 Course Schedule III 20.50% Medium
629 K Inverse Pairs Array 23.90% Hard 
628 Maximum Product of Three Numbers 45.40% Easy
627 Swap Salary  67.40% Easy
626 Exchange Seats     49.60% Medium
625 Minimum Factorization $ 29.50% Medium
624 Maximum Distance in Arrays $ 32.70% Easy 
623 Add One Row to Tree 48.70%  Medium
622 Design Circular Queue     36.60% Medium
621 Task Scheduler  41.40% Medium
620 Not Boring Movies     59.80% Easy
619 Biggest Single Number $  36.60% Easy
618 Students Report By Geography $ 40.40% Hard
617 Merge Two Binary Trees 69.60% Easy
616 Add Bold Tag in String $ 37.30% Medium
615 Average Salary: Departments VS Company $ 33.00% Hard
614 Second Degree Follower $ 22.70% Medium
613 Shortest Distance in a Line $ 70.60% Easy
612 Shortest Distance in a Plane $ 51.00% Medium
611 Valid Triangle Number 38.90% Medium
610 Triangle Judgement $  59.10% Easy
609 Find Duplicate File in System 52.50% Medium
608 Tree Node $ 54.60% Medium
607 Sales Person $
51.10% Easy
606 Construct String from Binary Tree 51.80% Easy
605 Can Place Flowers 30.00% Easy
604 Design Compressed String Iterator $ 31.60% Easy
603 Consecutive Available Seats $   54.50% Easy
602 Friend Requests II: Who Has the Most Friends $  42.50% Medium
601 Human Traffic of Stadium 33.80%  Hard
600 Non-negative Integers without Consecutive Ones 27.40% Hard
599 Minimum Index Sum of Two Lists 48.00% Easy
598 Range Addition II 48.30% Easy
597 Friend Requests I: Overall Acceptance Rate $ 38.40% Easy
596 Classes More Than 5 Students 33.40% Easy
595 Big Countries
72.00% Easy
594 Longest Harmonious Subsequence 40.00% Easy
593 Valid Square 39.20% Medium
592 Fraction Addition and Subtraction 47.00% Medium
591 Tag Validator 26.40% Hard
590 N-ary Tree Postorder Traversal
63.00% Easy
589 N-ary Tree Preorder Traversal 63.10% Easy
588 Design In-Memory File System $ 32.40%  Hard
587 Erect the Fence 29.90% Hard
586 Customer Placing the Largest Number of Orders $ 62.50% Easy
585 Investments in 2016 $ 44.60% Medium
584 Find Customer Referee $ 63.60% Easy
583 Delete Operation for Two Strings 44.00% Medium
582 Kill Process $ 47.70% Medium
581 Shortest Unsorted Continuous Subarray 30.10% Easy
580 Count Student Number in Departments $ 40.00% Medium
579 Find Cumulative Salary of an Employee $ 30.90% Hard
578 Get Highest Answer Rate Question $ 33.10% Medium
577 Employee Bonus $ 53.80% Easy
576 Out of Boundary Paths 33.10% Medium
575 Distribute Candies  59.50% Easy
574 Winning Candidate $
34.50% Medium
573 Squirrel Simulation $ 51.00% Medium
572 Subtree of Another Tree 41.00% Easy
571 Find Median Given Frequency of Numbers $ 44.90% Hard
570 Managers with at Least 5 Direct Reports $ 59.00% Medium
569 Median Employee Salary $
41.60% Hard 
568 Maximum Vacation Days $ 39.90% Hard
567 Permutation in String 36.30% Medium
566 Reshape the Matrix 59.80% Easy
565 Array Nesting 50.00% Medium
564 Find the Closest Palindrome 16.60% Hard
563 Binary Tree Tilt 47.00% Easy
562 Longest Line of Consecutive One in Matrix $ 38.80% Medium
561 Array Partition I 69.80% Easy
560 Subarray Sum Equals K  41.80% Medium
559 Maximum Depth of N-ary Tree 62.10% Easy
558 Quad Tree Intersection 36.40% Easy
557 Reverse Words in a String III 61.20% Easy
556 Next Greater Element III 27.70% Medium
555 Split Concatenated Strings $ 30.00% Medium
554 Brick Wall  42.70% Medium
553 Optimal Division  55.20% Medium
552 Student Attendance Record II 28.50% Hard
551 Student Attendance Record I 43.90% Easy
549 Binary Tree Longest Consecutive Sequence II $ 38.10% Medium
548 Split Array with Equal Sum $ 30.80% Medium
547 Friend Circles 49.00% Medium
546 Remove Boxes 29.60% Hard
545 Boundary of Binary Tree $ 29.10% Medium
544 Output Contest Matches $ 73.20% Medium
543 Diameter of Binary Tree 42.70% Easy
542 01 Matrix 32.50% Medium
541 Reverse String II 44.40% Easy
540 Single Element in a Sorted Array 55.90% Medium
539 Minimum Time Difference  44.70% Medium
538 Convert BST to Greater Tree 52.70% Medium
537 Complex Number Multiplication 65.90% Medium
536 Construct Binary Tree from String $ 36.30% Medium
535 Encode and Decode TinyURL 76.10% Medium
534 Game Play Analysis III $
67.10% Medium
533 Lonely Pixel II $ 38.90% Medium
532 K-diff Pairs in an Array 27.20% Easy
531 Lonely Pixel I $ 50.20% Medium
530 Minimum Absolute Difference in BST 48.00% Easy
529 Minesweeper 52.00% Medium
528 Random Pick with Weight 41.80% Medium
527 Word Abbreviation $ 33.90% Hard
526 Beautiful Arrangement 53.50% Medium
525 Contiguous Array   34.40% Medium
524 Longest Word in Dictionary through Deleting 40.20% Medium
523 Continuous Subarray Sum 21.30% Medium
522 Longest Uncommon Subsequence II 28.10% Medium
521 Longest Uncommon Subsequence I 50.70% Easy
520 Detect Capital 54.20% Easy
519 Random Flip Matrix 32.20% Medium
518 Coin Change 2 33.20% Medium
517 Super Washing Machines 34.60% Hard
516 Longest Palindromic Subsequence 42.00% Medium
515 Find Largest Value in Each Tree Row 52.70% Medium
514 Freedom Trail 27.20% Hard
513 Find Bottom Left Tree Value 55.60% Medium
510 Inorder Successor in BST II $
56.20% Medium
509 Fibonacci Number     66.40% Easy
508 Most Frequent Subtree Sum 52.00% Medium
507 Perfect Number 32.70% Easy
506 Relative Ranks 48.50% Easy
505 The Maze II $ 34.80% Medium
504 Base 7 46.40% Easy
503 Next Greater Element II 46.20% Medium
502 IPO 32.40% Hard
501 Find Mode in Binary Search Tree 39.40% Easy
500 Keyboard Row  60.20% Easy
499 The Maze III $ 32.00% Hard
498 Diagonal Traverse 46.20% Medium
497 Random Point in Non-overlapping Rectangles 33.20% Medium
496 Next Greater Element I  58.80% Easy
495 Teemo Attacking 51.90% Medium
494 Target Sum 44.40% Medium
493 Reverse Pairs 17.10% Hard
492 Construct the Rectangle 49.70% Easy
491 Increasing Subsequences 39.30%  Medium
490 The Maze $ 42.80% Medium
489 Robot Room Cleaner $ 57.10% Hard
488 Zuma Game  38.00% Hard
487 Max Consecutive Ones II $ 42.70% Medium
486 Predict the Winner 43.60% Medium
485 Max Consecutive Ones  55.30% Easy
484 Find Permutation $ 50.50% Medium
483 Smallest Good Base    30.60% Hard
482 License Key Formatting 41.20% Medium
481 Magical String 46.20% Medium
480 Sliding Window Median 31.00% Hard
479 Largest Palindrome Product 23.90% Easy
478 Generate Random Point in a Circle 33.80% Medium
477 Total Hamming Distance 44.10% Medium
476 Number Complement 61.20% Easy
475 Heaters  30.20% Easy
474 Ones and Zeroes  34.90% Medium
473 Matchsticks to Square  31.80% Medium
472 Concatenated Words 29.20% Hard
471 Encode String with Shortest Length $ 43.50% Hard
470 Implement Rand10() Using Rand7()
43.00% Medium
469 Convex Polygon $ 27.20% Medium
468 Validate IP Address 22.10% Medium
467 Unique Substrings in Wraparound String 29.90% Medium
466 Count The Repetitions  24.20% Hard
465 Optimal Account Balancing $ 29.20% Hard
464 Can I Win  22.20% Medium
463 Island Perimeter  56.70% Easy
462 Minimum Moves to Equal Array Elements II 50.90% Medium
461 Hamming Distance  73.20% Easy
460 LFU Cache 18.30% Hard
459 Repeated Substring Pattern  39.70% Easy
458 Poor Pigs 40.70% Easy
457 Circular Array Loop 20.60% Medium
456 132 Pattern  28.00% Medium
455 Assign Cookies 48.10% Easy
454 4Sum II 42.80% Medium
453 Minimum Moves to Equal Array Elements 46.30% Easy
452 Minimum Number of Arrows to Burst Balloons  42.10% Medium
451 Sort Characters By Frequency 50.90% Medium
450 Delete Node in a BST 34.50% Medium
449 Serialize and Deserialize BST  41.20% Medium
448 Find All Numbers Disappeared in an Array 58.30% Easy
447 Number of Boomerangs   42.20% Easy 
446 Arithmetic Slices II - Subsequence  22.30% Hard 
445 Add Two Numbers II   45.40% Medium
444 Sequence Reconstruction $ 20.50% Medium
443 String Compression 35.80% Easy
442 Find All Duplicates in an Array 46.40% Medium
441 Arranging Coins 36.20% Easy 
440 K-th Smallest in Lexicographical Order  21.50% Hard 
439 Ternary Expression Parser $ 49.40% Medium
438 Find All Anagrams in a String  33.50% Easy 
437 Path Sum III   38.60% Easy
436 Find Right Interval  42.30% Medium
435 Non-overlapping Intervals  39.80% Medium
434 Number of Segments in a String   38.40% Easy 
433 Minimum Genetic Mutation 33.50% Medium
432 All O`one Data Structure 28.30% Hard 
431 Encode N-ary Tree to Binary Tree 53.70% Hard
430 Flatten a Multilevel Doubly Linked List
36.20% Medium
429 N-ary Tree Level Order Traversal 55.80% Easy
428 Serialize and Deserialize N-ary Tree $ 48.10% Hard
427 Construct Quad Tree 49.20% Easy
426 Convert Binary Search Tree to Sorted Doubly Linked List $ 43.30% Medium
425 Word Squares $ 40.10% Hard
424 Longest Repeating Character Replacement 38.10% Medium
423 Reconstruct Original Digits from English 40.80% Medium
422 Valid Word Square $ 36.40% Easy
421 Maximum XOR of Two Numbers in an Array 36.40% Medium
420 Strong Password Checker  22.10% Hard
419 Battleships in a Board  59.30% Medium
418 Sentence Screen Fitting $ 25.10% Medium
417 Pacific Atlantic Water Flow 31.10% Medium
416 Partition Equal Subset Sum 36.80% Medium
415 Add Strings  41.50% Easy
414 Third Maximum Number   26.50% Easy
413 Arithmetic Slices  53.50% Medium
412 Fizz Buzz 57.50% Easy 
411 Minimum Unique Word Abbreviation $ 25.60% Hard
410 Split Array Largest Sum  25.00% Hard
409 Longest Palindrome  44.90% Easy
408 Valid Word Abbreviation $ 26.20% Easy
407 Trapping Rain Water II  33.10% Hard
406 Queue Reconstruction by Height 54.10% Medium
405 Convert a Number to Hexadecimal 41.80% Easy
404 Sum of Left Leaves  46.20% Easy
403 Frog Jump 31.70% Hard
402 Remove K Digits  25.90% Medium
401 Binary Watch  43.00% Easy
400 Nth Digit 30.70% Easy
399 Evaluate Division 34.60% Medium
398 Random Pick Index 30.40% Medium
397 Integer Replacement 25.90% Easy
396 Rotate Function  28.40% Easy
395 Longest Substring with At Least K Repeating Characters 32.50% Medium
394 Decode String 38.60% Medium
393 UTF-8 Validation  33.00% Medium
392 Is Subsequence   44.10% Medium
391 Perfect Rectangle 13.30% Hard 
390 Elimination Game 12.50%  Medium
389 Find the Difference 49.90% Easy 
388 Longest Absolute File Path  28.30%  Medium
387 First Unique Character in a String  43.10%  Easy 
386 Lexicographical Numbers 31.00%  Medium
385 Mini Parser  26.90%  Medium
384 Shuffle an Array  45.50%  Medium
383 Ransom Note 44.60%  Easy 
382 Linked List Random Node  48.60% Medium
381 Insert Delete GetRandom O(1) - Duplicates allowed 30.90% Hard
380 Insert Delete GetRandom O(1) 33.80% Medium
379 Design Phone Directory $  25.80%  Medium
378 Kth Smallest Element in a Sorted Matrix 40.20% Medium
377 Combination Sum IV  37.50% Medium
376 Wiggle Subsequence 35.80% Medium
375 Guess Number Higher or Lower II  28.30% Medium
374 Guess Number Higher or Lower  31.70% Easy
373 Find K Pairs with Smallest Sums  25.50% Medium
372 Super Pow 30.10% Medium
371 Sum of Two Integers  54.00% Easy
370 Range Addition $ 49.90% Medium
369 Plus One Linked List $ 50.10% Medium
368 Largest Divisible Subset  32.00% Medium
367 Valid Perfect Square  36.60% Medium
366 Find Leaves of Binary Tree $ 53.60% Medium
365 Water and Jug Problem  20.10% Medium
364 Nested List Weight Sum II $ 47.20% Medium
363 Max Sum of Rectangle No Larger Than K 27.00% Hard
362 Design Hit Counter $ 48.30% Medium
361 Bomb Enemy $ 32.60% Medium
360 Sort Transformed Array $ 40.80% Medium
359 Logger Rate Limiter $ 56.00% Easy
358 Rearrange String k Distance Apart $ 26.90% Hard
357 Count Numbers with Unique Digits  42.50% Medium
356 Line Reflection $ 28.70% Medium
355 Design Twitter 22.20% Medium
354 Russian Doll Envelopes  27.10% Hard
353 Design Snake Game $ 19.80% Medium
352 Data Stream as Disjoint Intervals  34.40% Hard
351 Android Unlock Patterns $ 32.00% Medium
350 Intersection of Two Arrays II 41.50% Easy
349 Intersection of Two Arrays 47.80% Easy 
348 Design Tic-Tac-Toe  $ 45.60% Medium
347 Top K Frequent Elements  44.50% Medium
346 Moving Average from Data Stream  $ 69.20% Easy
345 Reverse Vowels of a String  35.30% Easy
344 Reverse String 58.90% Easy
343 Integer Break 43.60% Medium
342 Power of Four 34.10% Easy
341 Flatten Nested List Iterator $ 18.70% Medium
340 Longest Substring with At Most K Distinct Characters $ 36.30% Hard
339 Nested List Weight Sum $ 54.60% Easy
338 Counting Bits  55.40% Medium
337 House Robber III  37.00% Medium
336 Palindrome Pairs  18.70% Hard
335 Self Crossing  18.00% Medium
334 Increasing Triplet Subsequence 33.20% Medium
333 Largest BST Subtree $ 26.50% Medium
332 Reconstruct Itinerary 23.40% Medium
331 Verify Preorder Serialization of a Binary Tree 31.50% Medium
330 Patching Array 28.80% Medium
329 Longest Increasing Path in a Matrix 29.50% Medium
328 Odd Even Linked List 37.80% Easy
327 Count of Range Sum 24.30% Hard
326 Power of Three 35.30% Easy
325 Maximum Size Subarray Sum Equals k $ 39.60% Easy
324 Wiggle Sort II 20.10% Medium
323 Number of Connected Components in an Undirected Graph $ 43.30% Medium
322 Coin Change 24.90% Medium
321 Create Maximum Number 19.10% Hard
320 Generalized Abbreviation $ 40.40% Medium
319 Bulb Switcher 39.20% Medium
318 Maximum Product of Word Lengths 38.70% Medium
317 Shortest Distance from All Buildings $ 29.10% Hard 
316 Remove Duplicate Letters 23.00% Medium
315 Count of Smaller Numbers After Self 28.20% Hard 
314 Binary Tree Vertical Order Traversal $ 30.10% Medium
313 Super Ugly Number 31.20% Medium
312 Burst Balloons 24.50% Medium
311 Sparse Matrix Multiplication $ 40.00% Medium
310 Minimum Height Trees  20.20% Medium
309 Best Time to Buy and Sell Stock with Cooldown  32.60% Medium
308 Range Sum Query 2D - Mutable $ 20.30% Hard
307 Range Sum Query - Mutable  14.50% Medium
306 Additive Number 23.30% Medium
305 Number of Islands II $ 26.70% Hard
304 Range Sum Query 2D - Immutable 21.50% Medium
303 Range Sum Query - Immutable 25.70% Easy
302 Smallest Rectangle Enclosing Black Pixels $ 36.70% Hard
301 Remove Invalid Parentheses 27.00% Hard
300 Longest Increasing Subsequence 31.50% Medium
299 Bulls and Cows 23.80% Easy
298 Binary Tree Longest Consecutive Sequence $ 32.20% Medium
297 Serialize and Deserialize Binary Tree 23.80% Medium
296 Best Meeting Point $ 41.40% Hard
295 Find Median from Data Stream 18.60% Hard
294 Flip Game II $ 38.10% Medium
293 Flip Game $ 47.60% Easy
292 Nim Game  49.50% Easy
291 Word Pattern II $ 31.50% Hard
290 Word Pattern 26.50% Easy
289 Game of Life 32.60% Medium
288 Unique Word Abbreviation $ 16.80% Easy
287 Find the Duplicate Number 32.80% Hard
286 Walls and Gates $ 29.90% Medium
285 Inorder Successor in BST $ 32.50% Medium
284 Peeking Iterator 31.00% Medium
283 Move Zeroes 41.40% Easy
282 Expression Add Operators 18.90% Hard
281 Zigzag Iterator $ 37.20% Medium
280 Wiggle Sort $ 43.30% Medium
279 Perfect Squares 28.80% Medium
278 First Bad Version 19.80% Easy
277 Find the Celebrity $ 31.70% Medium
276 Paint Fence $ 25.00% Easy
275 H-Index II 31.40% Medium
274 H-Index 25.30% Medium
273 Integer to English Words 15.50% Medium
272 Closest Binary Search Tree Value II $ 26.90% Hard
271 Encode and Decode Strings $ 25.40% Medium
270 Closest Binary Search Tree Value $ 29.40% Easy
269 Alien Dictionary $ 16.50% Hard
268 Missing Number 34.70% Medium
267 Palindrome Permutation II $ 22.50% Medium
266 Palindrome Permutation $ 45.80% Easy
265 Paint House II $ 30.00% Hard
264 Ugly Number II 21.60% Medium
263 Ugly Number 32.6% Easy
262 Trips and Users * 16.10% Hard
261 Graph Valid Tree $ 25.40% Medium
260 Single Number III 37.60% Medium
259 3Sum Smaller $ 34.20% Medium
258 Add Digits 46.50% Easy
257 Binary Tree Paths 21.90% Easy
256 Paint House $ 38.40% Medium
255 Verify Preorder Sequence in Binary Search Tree $ 32.30% Medium
254 Factor Combinations $ 29.00% Medium
253 Meeting Rooms II $ 28.80% Medium
252 Meeting Rooms $ 35.40% Easy
251 Flatten 2D Vector $ 28.30% Medium
250 Count Univalue Subtrees $ 32.70% Medium
249 Group Shifted Strings $ 25.20% Easy
248 Strobogrammatic Number III $ 21.80% Hard
247 Strobogrammatic Number II $ 26.70% Medium
246 Strobogrammatic Number $ 31.60% Easy
245 Shortest Word Distance III $ 43.20% Medium
244 Shortest Word Distance II $ 33.70% Medium
243 Shortest Word Distance $ 41.80% Easy
242 Valid Anagram 39.30% Easy
241 Different Ways to Add Parentheses 27.10% Medium
240 Search a 2D Matrix II 31.40% Medium
239 Sliding Window Maximum 24.30% Hard 
238 Product of Array Except Self 42.40% Medium
237 Delete Node in a Linked List 50.90% Easy
236 Lowest Common Ancestor of a Binary Tree 28.30% Medium
235 Lowest Common Ancestor of a Binary Search Tree 38.90% Medium
234 Palindrome Linked List 23.80% Easy
233 Number of Digit One 16.10% Medium
232 Implement Queue using Stacks 37.40% Easy
231 Power of Two 31.30% Easy
230 Kth Smallest Element in a BST 30.50% Medium
229 Majority Element II 30.50% Medium
228 Summary Ranges 21.10% Easy
227 Basic Calculator II 18.00% Medium
226 Invert Binary Tree 35.40% Easy
225 Implement Stack using Queues 29.60% Medium
224 Basic Calculator 15.80% Medium
223 Rectangle Area 25.60% Easy
222 Count Complete Tree Nodes 19.40% Medium
221 Maximal Square 20.30% Medium
220 Contains Duplicate III 15.30% Medium
219 Contains Duplicate II 25.60% Easy
218 The Skyline Problem 16.20% Hard
217 Contains Duplicate 35.90% Easy
216 Combination Sum III 27.70% Medium
215 Kth Largest Element in an Array 27.30% Medium
214 Shortest Palindrome 16.80% Hard
213 House Robber II 26.30% Medium
212 Word Search II 15.00% Hard
211 Add and Search Word - Data structure design 20.70% Medium
210 Course Schedule II 19.30% Medium
209 Minimum Size Subarray Sum 22.90% Medium
208 Implement Trie (Prefix Tree) 24.80% Medium
207 Course Schedule 21.70% Medium
206 Reverse Linked List 31.50% Easy
205 Isomorphic Strings 24.20% Easy
204 Count Primes 19.00% Easy
203 Remove Linked List Elements 25.80% Easy
202 Happy Number 31.40% Easy
201 Bitwise AND of Numbers Range 23.30% Medium
200 Number of Islands 21.90% Medium
199 Binary Tree Right Side View 27.10% Medium
198 House Robber 28.80% Easy
197 Rising Temperature * 25.90% Easy
196 Delete Duplicate Emails * 19.00% Easy
195 Tenth Line # 32.20% Easy
194 Transpose File # 21.40% Medium
193 Valid Phone Numbers # 24.40% Easy
192 Word Frequency # 26.10% Medium
191 Number of 1 Bits 37.30% Easy
190 Reverse Bits 28.40% Easy
189 Rotate Array 17.80% Easy
188 Best Time to Buy and Sell Stock IV 17.30% Hard
187 Repeated DNA Sequences 19.50% Medium
186 Reverse Words in a String II $ 31.10% Medium
185 Department Top Three Salaries * 15.20% Hard
184 Department Highest Salary * 19.00% Medium
183 Customers Who Never Order * 33.70% Easy
182 Duplicate Emails * 38.10% Easy
181 Employees Earning More Than Their Managers * 41.00% Easy
180 Consecutive Numbers * 26.60% Medium
179 Largest Number 15.70% Medium
178 Rank Scores * 24.60% Medium
177 Nth Highest Salary * 16.30% Medium
176 Second Highest Salary * 25.00% Easy
175 Combine Two Tables * 34.40% Easy
174 Dungeon Game 17.70% Hard
173 Binary Search Tree Iterator 29.30% Medium
172 Factorial Trailing Zeroes 28.40% Easy
171 Excel Sheet Column Number 36.50% Easy
170 Two Sum III - Data structure design $ 24.70% Easy
169 Majority Element 35.00% Easy
168 Excel Sheet Column Title 18.10% Easy
167 Two Sum II - Input array is sorted $ 43.30% Medium
166 Fraction to Recurring Decimal 12.70% Medium
165 Compare Version Numbers 15.20% Easy
164 Maximum Gap 24.40% Hard
163 Missing Ranges $ 24.10% Medium
162 Find Peak Element 31.50% Medium
161 One Edit Distance $ 24.00% Medium
160 Intersection of Two Linked Lists 28.70% Easy
159 Longest Substring with At Most Two Distinct Characters $ 30.20% Hard
158 Read N Characters Given Read4 II - Call multiple times $ 22.30% Hard
157 Read N Characters Given Read4 $ 29.80% Easy
156 Binary Tree Upside Down $ 34.30% Medium
155 Min Stack 18.50% Easy
154 Find Minimum in Rotated Sorted Array II 31.90% Hard
153 Find Minimum in Rotated Sorted Array 33.30% Medium
152 Maximum Product Subarray 19.40% Medium
151 Reverse Words in a String 15.10% Medium
150 Evaluate Reverse Polish Notation 21.10% Medium
149 Max Points on a Line 12.60% Hard
148 Sort List 22.00% Medium
147 Insertion Sort List 26.40% Medium
146 LRU Cache 15.00% Hard
145 Binary Tree Postorder Traversal 32.40% Hard
144 Binary Tree Preorder Traversal 36.30% Medium
143 Reorder List 21.00% Medium
142 Linked List Cycle II 31.40% Medium
141 Linked List Cycle 36.30% Medium
140 Word Break II 17.70% Hard
139 Word Break 23.00% Medium
138 Copy List with Random Pointer 25.10% Hard
137 Single Number II 35.00% Medium
136 Single Number 45.10% Medium
135 Candy 20.50% Hard
134 Gas Station 25.70% Medium
133 Clone Graph 24.00% Medium
132 Palindrome Partitioning II 19.70% Hard
131 Palindrome Partitioning 26.70% Medium
130 Surrounded Regions 14.60% Medium
129 Sum Root to Leaf Numbers 30.30% Medium
128 Longest Consecutive Sequence 29.40% Hard
127 Word Ladder 19.30% Medium
126 Word Ladder II 12.90% Hard
125 Valid Palindrome 22.00% Easy
124 Binary Tree Maximum Path Sum 21.50% Hard
123 Best Time to Buy and Sell Stock III 23.90% Hard
122 Best Time to Buy and Sell Stock II 38.30% Medium
121 Best Time to Buy and Sell Stock 32.60% Medium
120 Triangle 27.40% Medium
119 Pascal's Triangle II 29.40% Easy
118 Pascal's Triangle 30.10% Easy
117 Populating Next Right Pointers in Each Node II 32.00% Hard
116 Populating Next Right Pointers in Each Node 36.20% Medium
115 Distinct Subsequences 26.30% Hard
114 Flatten Binary Tree to Linked List 28.80% Medium
113 Path Sum II 26.60% Medium
112 Path Sum 29.80% Easy
111 Minimum Depth of Binary Tree 29.10% Easy
110 Balanced Binary Tree 32.00% Easy
109 Convert Sorted List to Binary Search Tree 27.90% Medium
108 Convert Sorted Array to Binary Search Tree 34.00% Medium
107 Binary Tree Level Order Traversal II 31.10% Easy
106 Construct Binary Tree from Inorder and Postorder Traversal 26.80% Medium
105 Construct Binary Tree from Preorder and Inorder Traversal 26.40% Medium
104 Maximum Depth of Binary Tree 45.10% Easy
103 Binary Tree Zigzag Level Order Traversal 26.40% Medium
102 Binary Tree Level Order Traversal 29.30% Easy
101 Symmetric Tree 31.60% Easy
100 Same Tree 41.80% Easy
99 Recover Binary Search Tree 24.30% Hard
98 Validate Binary Search Tree 20.60% Medium
97 Interleaving String 20.80% Hard
96 Unique Binary Search Trees 36.00% Medium
95 Unique Binary Search Trees II 28.00% Medium
94 Binary Tree Inorder Traversal 36.20% Medium
93 Restore IP Addresses 21.00% Medium
92 Reverse Linked List II 26.10% Medium
91 Decode Ways 16.40% Medium
90 Subsets II 27.70% Medium
89 Gray Code 32.80% Medium
88 Merge Sorted Array 29.70% Easy
87 Scramble String 24.20% Hard
86 Partition List 27.50% Medium
85 Maximal Rectangle 22.00% Hard
84 Largest Rectangle in Histogram 22.60% Hard
83 Remove Duplicates from Sorted List 34.50% Easy
82 Remove Duplicates from Sorted List II 25.00% Medium
81 Search in Rotated Sorted Array II 31.40% Medium
80 Remove Duplicates from Sorted Array II 30.50% Medium
79 Word Search 20.30% Medium
78 Subsets 28.20% Medium
77 Combinations 30.90% Medium
76 Minimum Window Substring 18.90% Hard
75 Sort Colors 32.60% Medium
74 Search a 2D Matrix 31.60% Medium
73 Set Matrix Zeroes 31.40% Medium
72 Edit Distance 26.20% Hard
71 Simplify Path 20.00% Medium
70 Climbing Stairs 34.40% Easy
69 Sqrt(x) 23.10% Medium
68 Text Justification 14.60% Hard
67 Add Binary 24.70% Easy
66 Plus One 30.40% Easy
65 Valid Number 11.40% Hard
64 Minimum Path Sum 32.20% Medium
63 Unique Paths II 28.00% Medium
62 Unique Paths 32.80% Medium
61 Rotate List 21.70% Medium
60 Permutation Sequence 22.80% Medium
59 Spiral Matrix II 31.80% Medium
58 Length of Last Word 28.00% Easy
57 Insert Interval 21.40% Hard
56 Merge Intervals 22.40% Hard
55 Jump Game 27.00% Medium
54 Spiral Matrix 20.80% Medium
53 Maximum Subarray 34.50% Medium
52 N-Queens II 35.80% Hard
51 N-Queens 26.50% Hard
50 Pow(x, n) 26.70% Medium
49 Group Anagrams 24.30% Medium
48 Rotate Image 31.90% Medium
47 Permutations II 25.80% Hard
46 Permutations 31.90% Medium
45 Jump Game II 24.20% Hard
44 Wildcard Matching 15.00% Hard
43 Multiply Strings 21.00% Medium
42 Trapping Rain Water 30.00% Hard
41 First Missing Positive 22.90% Hard
40 Combination Sum II 25.20% Medium
39 Combination Sum 27.90% Medium
38 Count and Say 25.20% Easy
37 Sudoku Solver 21.80% Hard
36 Valid Sudoku 27.20% Easy
35 Search Insert Position 35.40% Medium
34 Find First and Last Position of Element in Sorted Array
27.50% Medium
33 Search in Rotated Sorted Array 28.80% Hard
32 Longest Valid Parentheses 20.90% Hard
31 Next Permutation 25.00% Medium
30 Substring with Concatenation of All Words 19.40% Hard
29 Divide Two Integers 15.00% Medium
28 Find the Index of the First Occurrence in a String 22.20% Easy
27 Remove Element 32.10% Easy
26 Remove Duplicates from Sorted Array 31.30% Easy
25 Reverse Nodes in k-Group 25.50% Hard
24 Swap Nodes in Pairs 32.50% Medium
23 Merge k Sorted Lists 21.10% Hard
22 Generate Parentheses 32.60% Medium
21 Merge Two Sorted Lists 32.70% Easy
20 Valid Parentheses 26.50% Easy
19 Remove Nth Node From End of List 27.10% Easy
18 4Sum 21.70% Medium
17 Letter Combinations of a Phone Number 25.80% Medium
16 3Sum Closest 26.90% Medium
15 3Sum 16.90% Medium
14 Longest Common Prefix 25.50% Easy
13 Roman to Integer 34.00% Easy
12 Integer to Roman 33.80% Medium
11 Container With Most Water 32.00% Medium
10 Regular Expression Matching 20.70% Hard
9 Palindrome Number 28.30% Easy
8 String to Integer (atoi) 13.00% Easy
7 Reverse Integer 25.10% Easy
6 ZigZag Conversion 21.80% Easy
5 Longest Palindromic Substring 20.70% Medium
4 Median of Two Sorted Arrays 17.40% Hard
3 Longest Substring Without Repeating Characters 20.60% Medium
2 Add Two Numbers 21.10% Medium
1 Two Sum 17.70% Medium

 

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posted @ 2015-06-28 23:20  Grandyang  阅读(1292774)  评论(156编辑  收藏  举报
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