#include <fstream>

using namespace std;

char s[100010];
int i;

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

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

    fin>>s;

    fout<<expresie();

    return 0;
}