#include <bits/stdc++.h>
#define ll long long
#define LMAX 100010
using namespace std;
//Evaluare de expresii fara paranteze
ll n ;
char s[LMAX] , *p;

ll eval();
ll termen();
ll factor();

ll eval()
{
    ll r = termen();
    while (*p == '+' || *p == '-')
    {
        if (*p == '+')
           {
               p ++ ;
               r += termen();}
        if (*p == '-')
        {
            p ++ ;
            r -= termen();

        }
    }
    return r ;

}

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

}

ll factor()
{
    ll r = 0 ;
    if (*p == '(')
    {
        p ++ ;
        r  = eval();
        p ++ ;
    }
    while (isdigit(*p))
    {
        r = r * 10 + (*p - '0');
        p ++ ;
    }
    return r;
}

int main()
{
    freopen("evaluare.in" , "r" , stdin);
    freopen("evaluare.out" , "w" , stdout) ;
    scanf("%s" , &s);
    p = s ;
    printf("%lld" , eval()) ;
    return 0 ;
}