Generate Parentheses Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses. For example, given n = 3, a solution set is: "((()))", "(()())", "(())()", "()(())", "…

I thought I know Python... Actually , I know nothing... 这个题真想让人背下来啊,每一句都很帅!!! Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses. For example, given n = 3, a solution set is: [ "((()))", "…

作者: 负雪明烛 id: fuxuemingzhu 个人博客:http://fuxuemingzhu.cn/ 个人公众号:负雪明烛 本文关键词:括号, 括号生成,题解,leetcode, 力扣,Python, C++, Java 目录 题目描述 题目大意 解题方法 回溯法 日期 题目地址:https://leetcode.com/problems/generate-parentheses/description/ 题目描述 Given n pairs of parentheses, write…

题目描述: Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses. 解题分析: 这类题一般都要用递归的方法来解决.需要设两个集合类分别存储待匹配的(,)的个数. 这里需要明白一点:当待匹配的(的个数永远不小于待匹配的)的个数时只能匹配(,否则会导致错误.(可以自己在纸上试一下就好理解了),其余情况可以考虑匹配( 和)两种情况下可能的结果. 具体代…

一天一道LeetCode (一)题目 Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses. For example, given n = 3, a solution set is: "((()))", "(()())", "(())()", "()(())", "(…

# -*- coding: utf8 -*-'''__author__ = 'dabay.wang@gmail.com' 22: Generate Parentheseshttps://oj.leetcode.com/problems/generate-parentheses/ Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses.For exa…

题目 Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses. For example, given n = 3, a solution set is: [ "((()))", "(()())", "(())()", "()(())", "()()()" ]…

Sort Colors Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, white and blue. Here, we will use the integers 0, 1, and 2 to represent the color red, w…

Subsets II Given a collection of integers that might contain duplicates, S, return all possible subsets. Note: Elements in a subset must be in non-descending order. The solution set must not contain duplicate subsets. For example,If S = [1,2,2], a so…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址: https://leetcode.com/problems/generate-random-point-in-a-circle/description/ 题目描述: Given the radius and x-y positions of the center of a circle, write a function randPoint which generates…