#include <iostream>
#include <fstream>
using namespace std;
ifstream in("evaluare.in");
ofstream out("evaluare.out");
int i;
char v[100005];
int expresie();
int termen();
int factor();
int main()
{
    in >> v;
    out << expresie();
    return 0;
}
int expresie()
{
    int n = termen();
    while (v[i] == '+' || v[i] == '-')
        if (v[i] == '+')
        {
            i++;
            n += termen();
        }
        else
        {
            i++;
            n -= termen();
        }
    return n;
}
int termen()
{
    int n = factor();
    while (v[i] == '*' || v[i] == '/')
        if (v[i] == '*')
        {
            i++;
            n *= factor();
        }
        else
        {
            i++;
            n /= factor();
        }
    return n;
}
int factor()
{
    int n;
    if (v[i] == '(')
    {
        i++;
        n = expresie();
        i++;
    }
    else
    {
        n = 0;
        while (v[i] >= '0' && v[i] <= '9')
        {
            n *= 10;
            n += v[i] - '0';
            i++;
        }
    }
    return n;
}