Leetcode22

题目描述

1. Generate Parentheses Solved Medium Topics premium lock icon Companies Given n pairs of parentheses, write a function to gener...

Leetcode21

题目描述

You are given the heads of two sorted linked lists list1 and list2.

Merge the two lists into one sorted list. The list should...

leetcode20题解

题目描述

Given a string s containing just the characters ‘(‘, ‘)’, ‘{‘, ‘}’, ‘[’ and ‘]’, determine if the input string is valid.

A...

leetcode19题解

题目

Given the head of a linked list, remove the nth node from the end of the list and return its head.

解题思路

虽然...

leetcode18题解

题目描述

Given an array nums of n integers, return an array of all the unique quadruplets [nums[a], nums[b], nums[c], nums[d]] such that:<...

leetcode17题解

题目描述

Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. Retu...

leetcode16题解

题目描述

Given an integer array of length and an integer , find three integers in such that the sum is closest to .numsntargetnumstarget Read More

leetcode15题解

题目描述

给定一个整数数组 nums，返回所有满足以下条件的三元组 [nums[i], nums[j], nums[k]]：

1. 索引 i、j、k 互不相等，即 i ≠ j、i ≠ k 且 j ≠ k；
2. 三个元素的和为...