#include <fstream>

using namespace std;

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

const int DIM = 100010;

int ind;
char s[DIM];

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

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

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

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

int main() {
    fin >> s;

    ind = 0;
    fout << expresie();

    return 0;
}