//#include <iostream>
#include <fstream>
using namespace std;
ifstream cin("evaluare.in");
ofstream cout("evaluare.out");
const int DIM = 100000;
int p = 0;
char s[DIM];
int expresie();
int termen();
int factor();
int main()
{
    cin.getline(s, DIM);
    int rez = expresie();
    cout << rez;
    return 0;
}
int expresie()
{
    int sum = termen();
    while(s[p] == '+' || s[p] == '-')
    {
        if(s[p] == '+')
        {
            p++;
            sum += termen();
        }
        else
        {
            p++;
            sum += termen();
        }
    }
    return sum;
}
int termen()
{
    int prod = factor();
    while(s[p] == '*' || s[p] == '/')
    {
        if(s[p] == '*')
        {
            p++;
            prod *= factor();
        }
        else
        {
            p++;
            prod /= factor();
        }
    }
    return prod;
}
int factor()
{
    int val = 0, semn = 1;
    while(s[p] == '-')
    {
        semn = -semn;
        p++;
    }
    if(s[p] == '(')
    {
        p++;
        val = expresie();
        p++;
        return semn * val;
    }
    while(s[p] >= '0' && s[p] <= '9')
    {
        val = val * 10 +(s[p] - '0');
        p++;
    }
    return semn * val;
}