#include <fstream>
using namespace std;

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

string s;
int expresie();
int termen();
int factor();
int p;

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

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

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

int main()
{
    in >> s;
    p = 0;
    out << expresie();
}