#include <fstream>

using namespace std;

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

int i;
char s[100001];

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

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

int expresie()
{
    int r = termen();
    while (s[i] == '+' || s[i] == '-')
        if (s[i] == '+')
        {
            i++;
            r += termen();
        }
        else
        {
            i++;
            r -= termen();
        }
    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 factor()
{
    int r = 0;
    if (s[i] == '(')
    {
        i++;
        r = expresie();
        i++;
    }
    else
        while (s[i] >= '0' && s[i] <= '9')
        {
            r = r*10+s[i]-'0';
            i++;
        }
    return r;
}