#include <fstream>

using namespace std;

ifstream fin("expresie.in");
ofstream fout("expresie.out");

string s;
int i;

int expresie();
int termen();

int factor()
{
    int r = 0;
    if(s[i] == '(')
    {
        i++;
        r = expresie();
        i++;
    }
    else
    {
        while(isdigit(s[i]))
        {
            r = r * 10 + (s[i] - '0');
            i++;
        }
    }
    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 expresie()
{
    int r = termen();
    while(s[i] == '+' || s[i] == '-')
    {
        if(s[i] == '+')
        {
            i++;
            r += termen();
        }
        else
        {
            i++;
            r -= termen();
        }
    }
    return r;
}

int main()
{
    fin >> s;
    fout << expresie();
    return 0;
}