Problem : Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is defined as follows: The left subtree of a node con ...
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其他好文 时间：
2020-02-17 21:21:48
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105
Given an integer array nums, find the contiguous subarray (containing at least one number) which has the largest sum and return its sum. Example: Inpu ...
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其他好文 时间：
2020-02-17 19:59:09
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80
Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to trap after raining. ...
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移动开发 时间：
2020-02-17 19:37:00
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78
1.题目描述 英文版： Given an array nums of n integers, are there elements a, b, c in nums such that a + b + c = 0? Find all unique triplets in the array which ...
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其他好文 时间：
2020-02-17 00:47:28
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51
1.题目描述 英文版： Given n non negative integers a1, a2, ..., an , where each represents a point at coordinate (i, ai). n vertical lines are drawn such that ...
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其他好文 时间：
2020-02-16 20:34:34
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68
Given a sequence a[1],a[2],a[3]......a[n], your job is to calculate the max sum of a sub-sequence. For example, given (6,-1,5,4,-7), the max sum in th ...
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其他好文 时间：
2020-02-16 20:25:53
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53
Given a set of candidate numbers (candidates) (without duplicates) and a target number (target), find all unique combinations in candidates where the ...
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其他好文 时间：
2020-02-16 01:35:33
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58
Given a non-empty array of integers, return the k most frequent elements. Example 1: Input: nums = [1,1,1,2,2,3], k = 2 Output: [1,2] Example 2: Input ...
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其他好文 时间：
2020-02-16 01:07:50
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63
1 """ 2 Given a 2d grid map of '1's (land) and '0's (water), count the number of islands. An island is surrounded by water and is formed by connecting ...
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其他好文 时间：
2020-02-15 23:28:19
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68
1 """ 2 Given a matrix consists of 0 and 1, find the distance of the nearest 0 for each cell. 3 The distance between two adjacent cells is 1. 4 Exampl ...
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其他好文 时间：
2020-02-15 11:50:37
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74
