Find the cow

    #include<iostream>
    #include<cstdio>
    #include<string>
    #include<cstring>
    using namespace std;
    int main()
    {
    freopen("cowfind.in","r","stdin");
    freopen("cowfind.out","w","stdout");
        string s;
        int len,res=0,cnt=0;
        cin>>s;
        len=s.size();
        for(int i=0; i<len-1; i++)
        {
            if(s[i]=='(' && (s[i]==s[i+1]))cnt++;
            else if(s[i]==')' && (s[i]==s[i+1]))
            {
                res+=cnt;
            }
        }

        cout<<res<<endl;
        return 0;
    }