#include <fstream>

using namespace std;

ifstream in("evaluare.in");
ofstream out("evaluare.out");
int i;
string s;

int constanta();
int factor();
int termen();
int expresie();

int constanta()
{
    int r = 0;
    while(s[i] >= '0' && s[i] <= '9')
    {
        r = r*10 + (s[i] - '0');
        i++;
    }
    return r;
}

int factor()
{
    int r;
    if(s[i] == '(')
    {
        i++;
        r = expresie();
        i++;
    }
    else
    {
        r = constanta();
    }
    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()
{
    in>>s;

    out<<expresie();
    return 0;
}