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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define GG ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
  4. int main () { GG;
  5. string s;	
  6. cin>>s;		int n=s.size(),lb=0,ans=0;
  7. for(int i=0;i<n;i++)
  8. { if(s[i]=='(') lb++;
  9.   else if(lb>0) 
  10.   {lb--; ans++;
  11.   }
  12.  
  13. }
  14.  
  15. cout<<ans*2<<"\n";
  16. return 0;}
Success #stdin #stdout 0.01s 5308KB
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https://ideone.com/SfhjoO
language:
C++ (gcc 8.3)
created:
11 days ago
visibility:
public

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