#include <iostream>
#include <cstring>
using namespace std;

int solve(const char* c){

    int sum = 0;

    while (*c != '\0')
    {
        char ch = *c;
        int sign = 1;
        if (ch == ':')
        {
            if (*(c + 1) == '\0')
            {
                return sum;
            }

            if (*(c + 1) != ')' && *(c + 1) != '(')
            {
                c++;
                continue;
            }

            if (*(c + 1) == '(')
            {
                sign = -1;
            }
            else
            {
                sign = 1;
            }

            char parenthesis = *(c + 1);

            c++;

            while (*c == parenthesis)
            {
                sum += sign;
                //cout << parenthesis << sum << endl;
                c++;
            }

            continue;
        }

        c++;
    }

    return sum;
}

int main(){
    string s = "123ssdqwe: :123:))((:())) (((\0";
    const char* arr = s.c_str();
    cout << solve(arr) << endl;
}