CodeForces - 5C Longest Regular Bracket Sequence(栈、思维) CF5C Longest Regular Bracket Sequence 题目大意: 给出一个括号序列,求出最长合法子串和它的数量。 合法的定义:这个序列中左右括号匹配 思路: 建立一个数组ArrayArray对应字符串的每一位。 每次遇到左括号把其压入栈中,每
Codeforces 5C Longest Regular Bracket Sequence 题面 题意: 给你一个括号序列,求最长匹配的括号序列长度及数量. 题解: 考虑(赋为1,)赋为-1,画出前缀和的图像l1l1. 再把(赋为-1,)赋为1,画出后缀和的图像l2l2. 随意画一条直线k,画出l1,l2l1,l2均在k上方的部分,如图中阴影部分. 而阴影部分的下底...
#include<cstdio>#include<cstring>#include<algorithm>#include<cmath>#include<stack>usingnamespacestd; stack<int>t;intn,m,len,maxx;intdp[5000100];charstr[5000100];intmain(){while(scanf("%s",str)!=EOF){inti,j,k; len=strlen(str); memset(dp,0,sizeof(dp));for(i=0;i<len;i++){if...
11 using namespace std; 12 13 const int MAXN = 1e6 + 10; 14 const int INF = 0x3f3f3f3f; 15 char s[MAXN]; 16 int len[MAXN]; 17 stack<int> S; 18 19 int main(void) //Codeforces Beta Round #5 C. Longest Regular Bracket Sequence 20 { 21 // freopen ("", "r", stdin)...
CF5C Longest Regular Bracket Sequence 传送门 求一个括号序列的最长合法序列和它的数量 设 表示以 结尾的最长的合法序列 当当前字符为左括号 时,将它入栈 否则为右括号,并且栈不为空, 就是上一个入栈的左括号到当前位置的长度 当然 这种情况的答案是...
This is yet another problem dealing with regular bracket sequences. We should remind you that a bracket sequence is called regular, if by inserting «+» and «1» into it we can get a correct mathematical expression. For example, sequences «(())()», «()» and «((...
This is yet another problem dealing with regular bracket sequences. We should remind you that a bracket sequence is called regular, if by inserting «+» and «1» into it we can get a correct mathematical expression. For example, sequences «(())()», «()» and «((...
不能直接dp[i]=i-t+1,比如(()()())这样的例子就会出错,应为dp[i]=dp[i-1]+i-t+1。 代码 1#include<bits/stdc++.h>2#definelc(a) (a<<1)3#definerc(a) (a<<1|1)4#defineMID(a,b) ((a+b)>>1)5#definefin(name) freopen(name,"r",stdin)6#definefout(name) freopen(name,"...
最后求一下最长连续1的数量。 回到顶部(go to top) 代码 1#include <bits/stdc++.h>2usingnamespacestd;3constintmaxn=1e6+10;4chars[maxn];5intvis[maxn], Stack[maxn], top;6intmain(){7scanf("%s",s+1);8intn=strlen(s+1);9for(inti=1;i<=n;i++){10if(s[i]=='('){ Stack[...
CodeForces - 5C Longest Regular Bracket Sequence This is yet another problem dealing with regular bracket sequences. We should remind you that a bracket sequence is called regular, if by inserting «+» and «1» into it we can get a correct mathematical expression. For example, ...