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全部文章 / LeetCode （共151篇）

LeetCode: 199. Binary Tree Right Side View

LeetCode: 199. Binary Tree Right Side View 题目描述 Given a binary tree, imagine yourself standing on the right side of it, return the values of the nod...

2018-08-31

0 451

LeetCode: 191. Number of 1 Bits

LeetCode: 191. Number of 1 Bits 题目描述 Write a function that takes an unsigned integer and returns the number of '1' bits it has (also known as the Ha...

2018-08-30

0 439

LeetCode: 190. Reverse Bits

LeetCode: 190. Reverse Bits 题目描述 Reverse bits of a given 32 bits unsigned integer. Example: Input: 43261596 Output: 964176192 Explanation: 4326159...

2018-08-29

0 536

LeetCode: 189. Rotate Array

LeetCode: 189. Rotate Array 题目描述 Given an array, rotate the array to the right by k steps, where k is non-negative. Example 1: Input: [1,2,3,4,5,6...

2018-08-28

0 490

LeetCode: 188. Best Time to Buy and Sell Stock IV

LeetCode: 188. Best Time to Buy and Sell Stock IV 题目描述 Say you have an array for which the ith element is the price of a given stock on day i. Desi...

2018-08-27

0 382

LeetCode: 892. Surface Area of 3D Shapes

LeetCode: 892. Surface Area of 3D Shapes 题目描述 On a N * N grid, we place some 1 * 1 * 1 cubes. Each value v = grid[i][j] represents a tower of v cub...

2018-08-26

0 441

LeetCode: 187. Repeated DNA Sequences

LeetCode: 187. Repeated DNA Sequences 解题思路 All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTC...

2018-08-25

0 400

LeetCode: 185. Department Top Three Salaries

LeetCode: 185. Department Top Three Salaries 题目描述 The Employee table holds all employees. Every employee has an Id, and there is also a column for t...

2018-08-24

0 447

LeetCode: 184. Department Highest Salary

LeetCode: 184. Department Highest Salary 题目描述 The Employee table holds all employees. Every employee has an Id, a salary, and there is also a column...

2018-08-23

0 491

LeetCode: 183. Customers Who Never Order

LeetCode: 183. Customers Who Never Order 题目描述 Suppose that a website contains two tables, the Customers table and the Orders table. Write a SQL quer...

2018-08-22

0 447