paranteze2

#include<fstream>
using namespace std;
ifstream cin("paranteze2.in");
ofstream cout("paranteze2.out");
int main()
{
    char sir[255],*p;
    int k=0,max=0;
    cin>>sir;
    for(p=sir;*p;p++)
    {
        if(*p=='(')
            {
                k++;
                if(k>max)
                    max=k;
            }
        else
            k--;
    }
    cout<<max;
}