#include <fstream>

using namespace std;

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

char s[100100];
int i;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");

int expresie() {
    int r = termen();

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

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

int factor() {

    int r = 0;
    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;
}