#include <fstream>

using namespace std;

char s[100010];
int expresie(), termen(), factor(), i;

ifstream fin ("evaluare.in");
ofstream fout("evaluare.out");
int expresie(){
    int r;
    r = termen();

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

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