#include <bits/stdc++.h>

using namespace std;

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

char s[100001];
int i = 0;

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

int main()
{
    fin >> s;

    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;

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

    return r;
}

int constanta()
{
    int r = 0;

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

    return r;
}