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LeetCode

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全部文章 / LeetCode （共115篇）

【LeetCode】实现 strStr()

Implement strStr(). Return the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. Example 1: Input: hay...

2019-11-21

0 837

【LeetCode】67. Add Binary

Given two binary strings, return their sum (also a binary string). The input strings are both non-empty and contains only characters 1 or 0. Example...

2019-11-21

0 461

【LeetCode】杨辉三角

Given a non-negative integer numRows, generate the first numRows of Pascal's triangle. In Pascal's triangle, each number is the sum of the two numbe...

2019-11-21

0 395

【LeetCode】66. Plus One

Given a non-empty array of digits representing a non-negative integer, plus one to the integer. The digits are stored such that the most significant ...

2019-11-21

0 517

【LeetCode】747. Largest Number At Least Twice of Others

In a given integer array nums, there is always exactly one largest element. Find whether the largest element in the array is at least twice as much a...

2019-11-21

0 496

【LeetCode】724. Find Pivot Index

Given an array of integers nums, write a method that returns the "pivot" index of this array. We define the pivot index as the index where ...

2019-11-21

0 663

【LeetCode第 162 场周赛】回顾

162周的我也看了，就是写的不在咋地，补一下有点二百五奇数值单元格的数目3 重构 2 行二进制矩阵4 统计封闭岛屿的数目5 得分最高的单词集合6 1题 class Solution { public: int oddCells(int n, int ...

2019-11-18

0 548

【LeetCode第 163 场周赛】5265. Greatest Sum Divisible by Three

5265. Greatest Sum Divisible by Three Given an array nums of integers, we need to find the maximum possible sum of elements of the array such that it...

2019-11-18

0 446

【LeetCode第 163 场周赛】5264. Find Elements in a Contaminated Binary Tree

Given a binary tree with the following rules: root.val == 0 If treeNode.val == x and treeNode.left != null, then treeNode.left.val == 2 * x + 1 If tr...

2019-11-18

0 402

【LeetCode第 163 场周赛】5263. Shift 2D Grid

Given a 2D grid of size n * m and an integer k. You need to shift the grid k times. In one shift operation: Element at grid[i][j] becomes at grid[i]...

2019-11-18

0 510