#include <fstream>
using namespace std;

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

char s[100100];
int i;

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

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()
{
    in >> s;
    i = 0;
    out << expresie();
    return 0;
}