#include <iostream>
#include <fstream>

using namespace std;

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

const int N = 1e5 + 1;
char s[N];
int p;
int factor();
int termen();
int expresie();

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

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

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

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