#include <stdio.h>
#define ll long 
#define DIM 100010
char a[DIM],*p=a;
ll eval ();
ll termen ();
ll factor ();
int main ()
{
    freopen ("evaluare.in","r",stdin);
    freopen ("evaluare.out","w",stdout);    
    fgets (a,DIM,stdin);
    printf ("%ld",eval ());
    return 0;
}
ll eval ()
{
    ll r;
    r=termen ();
    while (*p=='+' || *p=='-')
    {
        if (*p=='+')
        {
            ++p;
            r+=termen ();
        }
        else if (*p=='-')
        {
            ++p;
            r-=termen ();
        }
    }
    return r;
}
ll termen ()
{
    ll r;
    r=factor ();
    while (*p=='*' || *p=='/')
    {
        if (*p=='*')
        {
            ++p;
            r*=termen ();
        }
        else if (*p=='/')
        {
            ++p;
            r/=termen ();
        }
    }
    return r;
}
ll factor ()
{
    ll r=0;
    if (*p=='(')
    {
        ++p;
        r=eval ();
        ++p;
    }
    else
        while (*p>='0' && *p<='9')
        {
            r=r*10+*p-'0';
            ++p;
        }
    return r;
}