#include <bits/stdc++.h>

using namespace std;

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

string s;
int i = 0;

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

int expresie()
{
    int ans = termen();

    while (s[i] == '+' || s[i] == '-')
    {
        if (s[i] == '+')
        {
            i++;
            ans += termen();
        }
        else
        {
            i++;
            ans -= termen();
        }
    }
    return ans;
}

int termen()
{
    int ans = factor();

    while (s[i] == '*' || s[i] == '/')
    {
        if (s[i] == '*')
        {
            i++;
            ans *= factor();
        }
        else
        {
            i++;
            ans /= factor();
        }
    }
    return ans;
}

int factor()
{

    if (s[i] == '(')
    {
        i++;

        int ans = expresie();
        i++;

        return ans;
    }

    else
    {
        int nr = 0;

        while (isdigit(s[i]) == 1)
        {
            nr = nr * 10 + s[i] -'0';
            i++;
        }

        return nr;
    }
}

int main()
{
    getline(fin, s);

    s = ' ' + s;
    i = 1;

    fout << expresie();
    return 0;
}