明确一下  一个字符串有x左括号不匹配  和 另一个字符串有x个右括号不匹配  这俩是一定能够匹配的 脑子有点迷 emm... 所以统计就好了  统计x个左括号的有几个,x个右括号的有几个 然后 乘一下 如果一个串 同时存在左右括号都不匹配的情况 则忽略 因为这个串需要另外两个括号去匹配 不要忘了处理左右括号已经匹配的情况 #include <bits/stdc++.h> using namespace std; , INF = 0x7fffffff; typedef long long LL

Almost Regular Bracket Sequence CodeForces - 1095E You are given a bracket sequence ss consisting of nn opening '(' and closing ')' brackets. A regular bracket sequence is a bracket sequence that can be transformed into a correct arithmetic expressio

There is a sequence of brackets, which supports two kinds of operations. we can choose a interval [l,r], and set all the elements range in this interval to left bracket or right bracket. we can reverse a interval, which means that for all the element

(CodeForces - 5C)Longest Regular Bracket Sequence time limit per test:2 seconds memory limit per test:256 megabytes input:standard input output:standard output This is yet another problem dealing with regular bracket sequences. We should remind you t

[#138 div 1 A. Bracket Sequence] [原题] A. Bracket Sequence time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output A bracket sequence is a string, containing only characters "(", ")"

简述:改变序列算法,参见http://www.cplusplus.com/reference/algorithm/?kw=algorithm 待解决问题:iterator_traits.std::move /* template <class BidirectionalIterator, class UnaryPredicate> BidirectionalIterator partition (BidirectionalIterator first, BidirectionalIterato

C. Replace To Make Regular Bracket Sequence 题目连接: http://www.codeforces.com/contest/612/problem/C Description You are given string s consists of opening and closing brackets of four kinds <>, {}, [], (). There are two types of brackets: opening and

C. Longest Regular Bracket Sequence Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/problemset/problem/5/C Description This is yet another problem dealing with regular bracket sequences. We should remind you that a bracket sequence

Replace To Make Regular Bracket Sequence You are given string s consists of opening and closing brackets of four kinds <>, {}, [], (). There are two types of brackets: opening and closing. You can replace any bracket by another of the same type. For

E. Correct Bracket Sequence Editor 题目连接: http://www.codeforces.com/contest/670/problem/E Description Recently Polycarp started to develop a text editor that works only with correct bracket sequences (abbreviated as CBS). Note that a bracket sequence

D. Least Cost Bracket Sequence 题目连接: http://www.codeforces.com/contest/3/problem/D Description This is yet another problem on regular bracket sequences. A bracket sequence is called regular, if by inserting "+" and "1" into it we get a

This is yet another problem on regular bracket sequences. A bracket sequence is called regular, if by inserting "+" and "1" into it we get a correct mathematical expression. For example, sequences "(())()", "()" and

传送门 题意: 给你一个只包含 '(' 和 ')' 的长度为 n 字符序列s: 给出一个操作:将第 i 个位置的字符反转('(' ')' 互换): 问有多少位置反转后,可以使得字符串 s 变为"Regular Bracket Sequence": 输出满足条件的位置的个数: 题解: 令 '(' = 1 , ')' = -1: 定义 sum[i]:括号序列的前缀和: 一个合法的括号匹配串的充要条件是: [1] 对于任何 i,sum[i] ≥ 0: [2] sum[n]=0: int n;

题目 This is yet another problem on regular bracket sequences. A bracket sequence is called regular, if by inserting "+" and "1" into it we get a correct mathematical expression. For example, sequences "(())()", "()"

Least Cost Bracket Sequence CodeForces - 3D 题目描述 This is yet another problem on regular bracket sequences. A bracket sequence is called regular, if by inserting "+" and "1" into it we get a correct mathematical expression. For example,

Regular Bracket Sequence time limit per test:1 second memory limit per test:256 megabytes input:standard input output:standard output A string is called bracket sequence if it does not contain any characters other than "(" and ")". A b

                                    Bracket Sequence Time Limit: 3000MS   Memory Limit: 65536KB   64bit IO Format: %lld & %llu [Submit]   [Go Back]   [Status] Description There is a sequence of brackets, which supports two kinds of operations.1. we c

E. Correct Bracket Sequence Editor time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Recently Polycarp started to develop a text editor that works only with correct bracket sequences (abbrev

You are given string s consists of opening and closing brackets of four kinds <>, {}, [], (). There are two types of brackets: opening and closing. You can replace any bracket by another of the same type. For example, you can replace < by the bra

C. Replace To Make Regular Bracket Sequence time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You are given string s consists of opening and closing brackets of four kinds <>, {}, [], (). Th

题目传送门 /* 题意:求最长括号匹配的长度和它的个数 贪心+stack:用栈存放最近的左括号的位置,若是有右括号匹配,则记录它们的长度,更新最大值,可以在O (n)解决 详细解释:http://blog.csdn.net/taoxin52/article/details/26012167 */ #include <cstdio> #include <algorithm> #include <cstring> #include <cmath> #includ