#include <fstream>
using namespace std;

ifstream fin ("evaluare.in");
ofstream fout("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++; /// salt peste paranteza deschisa
        r = expresie();
        i++; /// salt peste paranteza inchisa
    } else {
        /// sigur este o valoare
        r = 0;
        while (s[i] >= '0' && s[i] <= '9') {
            r = r * 10 + s[i] - '0';
            i++;
        }
    }
    return r;
}

int main ()
{
    fin >> s;
    i = 0; // pozitia primului caracter
    fout << expresie();

    return 0;
}