42. Trapping Rain Water 接雨水问题Given n non-negative integers representing ...

41. First Missing Positive 缺失的第一个正数 Given an unsorted integer array nums...

39. Combination Sum Given an array of distinct integers candidates and a...

35. Search Insert Position Given a sorted array of distinct integers and...

34. Find First and Last Position of Element in Sorted Array Given an arr...

33. Search in Rotated Sorted Array 寻找旋转排序数组 There is an integer array nu...

32. Longest Valid Parentheses 最长合适的配对括号 Given a string containing just t...

31. Next Permutation 下一排列 A permutation of an array of integers is an ar...

25. Reverse Nodes in k-Group Given the head of a linked list, reverse th...