Hi, I have used the same logic as editorial in problem 5C but my code gets the wrong answer.↵
https://codeforces.net/contest/5/problem/C↵
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~~~~~↵
#include<bits/stdc++.h>↵
using namespace std;↵
↵
const int MAXN = 1e6;↵
int dp[MAXN];↵
↵
int main()↵
{↵
string str;cin >> str;↵
stack<int> s;int maxs=0,su0;↵
for(int i=0;i<str.size();++i){↵
if(str[i]=='('){↵
s.push(i);dp[i]=-1;↵
}else{↵
if(s.empty()) dp[i]=-1;↵
else{↵
int top = s.top();int res = i-top+1;↵
if(top!=0 && str[top-1]==')' && dp[top-1]!=-1) res += dp[top-1];↵
dp[i]=res;maxs=max(maxs,dp[i]);↵
}↵
}↵
}cout << maxs;↵
}↵
~~~~~↵
↵
https://codeforces.net/contest/5/problem/C↵
↵
↵
~~~~~↵
#include<bits/stdc++.h>↵
using namespace std;↵
↵
const int MAXN = 1e6;↵
int dp[MAXN];↵
↵
int main()↵
{↵
string str;cin >> str;↵
stack<int> s;int maxs=0,su0;↵
for(int i=0;i<str.size();++i){↵
if(str[i]=='('){↵
s.push(i);dp[i]=-1;↵
}else{↵
if(s.empty()) dp[i]=-1;↵
else{↵
int top = s.top();int res = i-top+1;↵
if(top!=0 && str[top-1]==')' && dp[top-1]!=-1) res += dp[top-1];↵
dp[i]=res;maxs=max(maxs,dp[i]);↵
}↵
}↵
}cout << maxs;↵
}↵
~~~~~↵
↵
