#include <fstream>

using namespace std;

ifstream fin ("evaluare.in");
ofstream fout ("evaluare.out");

char s[100004];
int i, r;

int expresie(), termen(), factor();

int factor(){
    int r;
    if(s[i] == '('){
        i++;
        r = expresie();
        i++;
    }
    else{
        r = 0;
        while(s[i] >= '0' && s[i] <= '9'){
            r = r * 10 + s[i] - '0';
            i++;
        }
    }
    return r;
}

int termen(){
    int r;
    r = factor();
    while(s[i] == '*' || s[i] == '/'){
        if(s[i] == '*'){
            i++;
            r *= factor();
        }
        else{
            i++;
            r /= factor();
        }
    }
    return r;
}

int expresie(){
    int r;
    r = termen();
    while(s[i] == '+' || s[i] == '-'){
        if(s[i] == '+'){
            i++;
            r += termen();
        }
        else{
            i++;
            r -= termen();
        }
    }
    return r;
}

int main()
{
    i = 0;
    fin>>s;
    fout<<expresie();
    return 0;
}