/* Evaluarea unei expresii folosind recursia indirecta */
#include <cstdio>
#define MAX 100001

char s[MAX], *p;

int exp();

int factor()
{
    int r = 0;
    if (*p == '(')
    {
        p++;
        r = exp();
        p++;
    }
    else
    {
        while ('0' <= *p && *p <= '9')
        {
            r = r * 10 + *p - '0';
            p++;
        }
    }
    return r;
}

int termen()
{
    int r = factor();
    while (*p == '*' || *p == '/')
    {
        if (*p == '*')
        {
            p++;
            r *= factor();
        }
        else
        {
            p++;
            r /= factor();
        }
    }
    return r;
}

int exp()
{
    int r = termen();
    while (*p == '+' || *p == '-')
    {
        if (*p == '+')
        {
            p++;
            r += termen();
        }
        else
        {
            p++;
            r -= termen();
        }
    }
    return r;
}

int main()
{
    freopen("evaluare.in","r",stdin);
    freopen("evaluare.out","w",stdout);
    scanf("%s", s);
    p = s;
    printf("%d\n", exp());
}