[leetcode]Add Binary
摘要：
Add BinaryGiven two binary strings, return their sum (also a binary string).For example,a ="11"b ="1"Return"100".算法思路：模拟二进制加法，跟十进制木有区别，将a，b转置(不转置的话，倒着... 阅读全文
[leetcode]Substring with Concatenation of All Words
摘要：
Substring with Concatenation of All WordsYou are given a string,S, and a list of words,L, that are all of the same length. Find all starting indices o... 阅读全文
[leetcode]Valid Parentheses
摘要：
Valid ParenthesesGiven a string containing just the characters'(',')','{','}','['and']', determine if the input string is valid.The brackets must clos... 阅读全文
[leetcode]Reverse Words in a String
摘要：
Reverse Words in a StringGiven an input string, reverse the string word by word.For example,Given s = "the sky is blue",return "blue is sky the".click... 阅读全文
[leetcode]ZigZag Conversion
摘要：
ZigZag ConversionThe string"PAYPALISHIRING"is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern i... 阅读全文
[leetcode]Gray Code
摘要：
Gray CodeThe gray code is a binary numeral system where two successive values differ in only one bit.Given a non-negative integernrepresenting the tot... 阅读全文
[leetcode]Permutation Sequence
摘要：
Permutation SequenceThe set[1,2,3,…,n]contains a total ofn! unique permutations.By listing and labeling all of the permutations in order,We get the fo... 阅读全文
[leetcode]Next Permutation
摘要：
Next PermutationImplement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers.If such arrangemen... 阅读全文
[leetcode]PermutationsII
摘要：
Permutations IIGiven a collection of numbers that might contain duplicates, return all possible unique permutations.For example,[1,1,2]have the follow... 阅读全文
[leetcode]Add Two Numbers
摘要：
Add Two NumbersYou are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes co... 阅读全文