杨领well

LeetCode

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全部文章 / LeetCode （共151篇）

LeetCode: 215. Kth Largest Element in an Array

LeetCode: 215. Kth Largest Element in an Array 题目描述 Find the kth largest element in an unsorted array. Note that it is the kth largest element in th...

2018-10-01

0 469

LeetCode: 214. Shortest Palindrome

LeetCode: 214. Shortest Palindrome 题目描述 Given a string s, you are allowed to convert it to a palindrome by adding characters in front of it. Find an...

2018-09-30

0 467

LeetCode: 211.Add and Search Word - Data structure design

LeetCode: 211.Add and Search Word - Data structure design 题目描述 Design a data structure that supports the following two operations: void addWord(wor...

2018-09-26

0 514

LeetCode: 208. Implement Trie (Prefix Tree)

LeetCode: 208. Implement Trie (Prefix Tree) 题目描述 Implement a trie with insert, search, and startsWith methods. Example: Trie trie = new Trie(); t...

2018-09-23

0 405

LeetCode: 204. Count Primes

LeetCode: 204. Count Primes 题目描述 Count the number of prime numbers less than a non-negative number, n. Example: Input: 10 Output: 4 Explanation: T...

2018-09-18

0 428

LeetCode: 203. Remove Linked List Elements

LeetCode: 203. Remove Linked List Elements 题目描述 Remove all elements from a linked list of integers that have value val. Example: Input: 1->2-&...

2018-09-14

0 462

LeetCode: 202. Happy Number

LeetCode: 202. Happy Number 题目描述 Write an algorithm to determine if a number is “happy”. A happy number is a number defined by the following proces...

2018-09-13

0 546

LeetCode: 201. Bitwise AND of Numbers Range

LeetCode: 201. Bitwise AND of Numbers Range 题目描述 Given a range [m, n] where 0 <= m <= n <= 2147483647, return the bitwise AND of all number...

2018-09-12

0 510

LeetCode: 200. Number of Islands

LeetCode: 200. Number of Islands 题目描述 Given a 2d grid map of '1's (land) and '0's (water), count the number of islands. An island is surrounded by w...

2018-09-11

0 457

LeetCode: 902. Numbers At Most N Given Digit Set

LeetCode: 902. Numbers At Most N Given Digit Set 题目描述 We have a sorted set of digits D, a non-empty subset of {'1','2','3','4','5','6','7','8','9'}....

2018-09-09

0 564