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全部文章 / LeetCode （共151篇）

LeetCode: 228. Summary Ranges

LeetCode: 228. Summary Ranges 题目描述 Given a sorted integer array without duplicates, return the summary of its ranges. Example 1: Input: [0,1,2,4,...

2018-10-22

0 563

LeetCode: 227. Basic Calculator II

LeetCode: 227. Basic Calculator II 题目描述 Implement a basic calculator to evaluate a simple expression string. The expression string contains only no...

2018-10-21

0 479

LeetCode: 225. Implement Stack using Queues

LeetCode: 225. Implement Stack using Queues 题目描述 Implement the following operations of a stack using queues. push(x) – Push element x onto stack...

2018-10-19

0 402

LeetCode: 223. Rectangle Area

LeetCode: 223. Rectangle Area 题目描述 Find the total area covered by two rectilinear rectangles in a 2D plane. Each rectangle is defined by its bottom...

2018-10-15

0 580

LeetCode: 222. Count Complete Tree Nodes

LeetCode: 222. Count Complete Tree Nodes 题目描述 Given a complete binary tree, count the number of nodes. Note: Definition of a complete binary tree ...

2018-10-14

0 526

LeetCode: 221. Maximal Square

LeetCode: 221. Maximal Square 题目描述 Given a 2D binary matrix filled with 0's and 1's, find the largest square containing only 1's and return its area...

2018-10-13

0 657

LeetCode: 220. Contains Duplicate III

LeetCode: 220. Contains Duplicate III 题目描述 Given an array of integers, find out whether there are two distinct indices i and j in the array such tha...

2018-10-10

0 514

LeetCode: 219. Contains Duplicate II

LeetCode: 219. Contains Duplicate II 题目描述 Given an array of integers and an integer k, find out whether there are two distinct indices i and j in th...

2018-10-09

0 442

LeetCode: 218. The Skyline Problem

LeetCode: 218. The Skyline Problem 题目描述 A city’s skyline is the outer contour of the silhouette formed by all the buildings in that city when viewed...

2018-10-08

0 583

LeetCode: 216. Combination Sum III

LeetCode: 216. Combination Sum III 题目描述 Find all possible combinations of k numbers that add up to a number n, given that only numbers from 1 to 9 c...

2018-10-02

0 521