#include <fstream>

using namespace std;

ifstream cin("evaluare.in");
ofstream cout("evaluare.out");

string s;

int p(0);

int expresie();

int factor() {
    int val(0), semn(1);
    while (s[p] == '-') {
        ++p;
        semn = -semn;
    }
    if (s[p] == '(') {
        ++p;
        val = expresie();
        ++p;
        return semn * val;
    }
    while (s[p] >= '0' && s[p] <= '9') {
        val = val * 10 + s[p++] - '0';
    }
    return semn * val;
}

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

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

int main()
{
    cin >> s;
    cout << expresie();
    return 0;
}