其实是这道题的变式(某港带同学的C/C++作业) 增加一点难度,输入的S不一定为平衡的,需要自己判断是否平衡,若不平衡输出为0. 题目描述 Given a parentheses string s, compute the score of the string based on the following rule: • If s is not balanced, the score is 0. • () has score 1. • AB has score A + B, where A a…
Given a balanced parentheses string S, compute the score of the string based on the following rule: () has score 1 AB has score A + B, where A and B are balanced parentheses strings. (A) has score 2 * A, where A is a balanced parentheses string. Exam…
Given a balanced parentheses string S, compute the score of the string based on the following rule: () has score 1 AB has score A + B, where A and B are balanced parentheses strings. (A) has score 2 * A, where A is a balanced parentheses string. Exam…
Write a SQL query to rank scores. If there is a tie between two scores, both should have the same ranking. Note that after a tie, the next ranking number should be the next consecutive integer value. In other words, there should be no "holes" be…
请点击页面左上角 -> Fork me on Github 或直接访问本项目Github地址:LeetCode Solution by Swift 说明:题目中含有$符号则为付费题目. 如:[Swift]LeetCode156.二叉树的上下颠倒 $ Binary Tree Upside Down 请下拉滚动条查看最新 Weekly Contest!!! Swift LeetCode 目录 | Catalog 序 号 题名Title 难度 Difficulty 两数之…
LeetCode第90场周赛记录 第一题:亲密字符串 问题: 给定两个由小写字母构成的字符串 A 和 B ,只要我们可以通过交换 A 中的两个字母得到与 B 相等的结果,就返回 true :否则返回 false . 示例 1: 输入: A = "ab", B = "ba" 输出: true 示例 2: 输入: A = "ab", B = "ab" 输出: false 示例 3: 输入: A = "aa",…
一.什么是数据结构栈 在数据结构中有一个栈结构,在内存空间中也有一个栈空间,这两个”栈“是两个不同的概念.这篇我们说的是数据结构中的栈.栈是一种特殊的线性表,特殊性在哪?就是只能在栈顶进行操作,往栈顶添加元素,一般叫push, 入栈:从栈顶移除元素,一般叫pop, 出栈,操作如图: 这个特征叫”后进先出“,Last In First On, 简称LIFO.和JS数组中的push和pop函数功能有点像.当然栈的内部设计,就可以用数组,或者也可以用链表. 二.栈结构设计和应用示例 2.1 内部…
Given two integers representing the numerator and denominator of a fraction, return the fraction in string format. If the fractional part is repeating, enclose the repeating part in parentheses. For example, Given numerator = 1, denominator = 2, retu…
作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 栈 递归 计数 日期 题目地址:https://leetcode.com/problems/score-of-parentheses/description/ 题目描述 Given a balanced parentheses string S, compute the score of the string based on the followi…
Remove the minimum number of invalid parentheses in order to make the input string valid. Return all possible results. Note: The input string may contain letters other than the parentheses ( and ). Examples: "()())()" -> ["()()()",…
Given a string of numbers and operators, return all possible results from computing all the different possible ways to group numbers and operators. The valid operators are +, -and *. Example 1 Input: "2-1-1". ((2-1)-1) = 0 (2-(1-1)) = 2 Output: …
Given a string containing just the characters '(' and ')', find the length of the longest valid (well-formed) parentheses substring. For "(()", the longest valid parentheses substring is "()", which has length = 2. Another example is &…
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: "((()))", "(()())", "(())()", "()(())", "()()()" 在LeetCo…
Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brackets must close in the correct order, "()" and "()[]{}" are all valid but "(]" and "([)]"…
Given a string containing only three types of characters: '(', ')' and '*', write a function to check whether this string is valid. We define the validity of a string by these rules: Any left parenthesis '(' must have a corresponding right parenthesi…
Given a string representing an expression of fraction addition and subtraction, you need to return the calculation result in string format. The final result should be irreducible fraction. If your final result is an integer, say 2, you need to change…
A sorted list A contains 1, plus some number of primes. Then, for every p < q in the list, we consider the fraction p/q. What is the K-th smallest fraction considered? Return your answer as an array of ints, where answer[0] = pand answer[1] = q. Ex…
