#include <bits/stdc++.h>
using namespace std;

char s[100001];
int i, n;
int expresie();
int termen();
int factor();
int constanta();

int expresie()
{
    int ans = termen();
    while (i < n && s[i] == '+' || s[i] == '-')
    {
        if (s[i] == '+')
        {
            ++i;
            ans += termen();
        }
        else
        {
            ++i;
            ans -= termen();
        }
    }

    return ans;
}

int termen()
{
    int ans = factor();
    while (i < n && s[i] == '*' || s[i] == '/')
    {
        if (s[i] == '*')
        {
            ++i;
            ans *= factor();
        }
        else
        {
            ++i;
            ans /= factor();
        }
    }

    return ans;
}

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

    return r;
}

int constanta()
{
    int number = 0;
    while (i < n && isdigit(s[i]))
    {
        number = number * 10 + s[i] - '0';
        ++i;
    }
    return number;
}

int main()
{
    ifstream cin("evaluare.in");
    ofstream cout("evaluare.out");
    cin >> s;
    n = strlen(s);
    cout << expresie();

    return 0;
}