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Implement strStr()Implement strStr().Returns the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack.最简单的思路，逐... 阅读全文
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Sudoku SolverWrite a program to solve a Sudoku puzzle by filling the empty cells.Empty cells are indicated by the character'.'.You may assume that the... 阅读全文
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Interleaving StringGivens1,s2,s3, find whethers3is formed by the interleaving ofs1ands2.For example,Given:s1="aabcc",s2="dbbca",Whens3="aadbbcbcac", r... 阅读全文
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Canvas1.所有的UI元件都需要放在Canvas里2.UI元件的绘制顺序，与在 Hierarchy的顺序相同，在上面的元素会先被绘制，位于后续绘制元素的下面3.可以选择3种不同的渲染模式：Screen Space - Overlay类似于深度摄像机，会将UI渲染到游戏场景的最前面Screen S... 阅读全文
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Roman to IntegerGiven a roman numeral, convert it to an integer.Input is guaranteed to be within the range from 1 to 3999.罗马数字有如下符号：基本字符IVXLCDM阿拉伯数字15... 阅读全文
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Valid SudokuDetermine if a Sudoku is valid, according to:Sudoku Puzzles - The Rules.The Sudoku board could be partially filled, where empty cells are ... 阅读全文
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Sort ListSort a linked list inO(nlogn) time using constant space complexity.需要采用归并排序对链表进行操作。归并排序思想：每次选取链表中间元素，把链表分割成两部分，递归分割，直到链表中的元素是有序的时候（即只有一个元素时候）... 阅读全文
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Majority ElementGiven an array of sizen, find the majority element. The majority element is the element that appears more than⌊ n/2 ⌋times.You may ass... 阅读全文
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String to Integer (atoi)Implementatoito convert a string to an integer.Hint:Carefully consider all possible input cases. If you want a challenge, plea... 阅读全文
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Merge Sorted ArrayGiven two sorted integer arrays A and B, merge B into A as one sorted array.Note:You may assume that A has enough space (size that i... 阅读全文
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Trapping Rain WaterGivennnon-negative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to tr... 阅读全文
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Search in Rotated Sorted Array IIFollow up for "Search in Rotated Sorted Array":What ifduplicatesare allowed?Would this affect the run-time complexity... 阅读全文
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Search in Rotated Sorted ArraySuppose a sorted array is rotated at some pivot unknown to you beforehand.(i.e.,0 1 2 4 5 6 7might become4 5 6 7 0 1 2).... 阅读全文
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Excel Sheet Column TitleGiven a non-zero positive integer, return its corresponding column title as appear in an Excel sheet.For example: 1 -> A ... 阅读全文