#include <algorithm>
using namespace std;

#define DIM 100005

char s[DIM],*p=s;

int eval ();
int termen ();
int factor ();

int eval ()
{
    int r;

    for (r=termen (); *p=='+' || *p=='-'; )
    {
        if (*p=='+')
        {
            ++p;
            r+=termen ();
        }
        if (*p=='-')
        {
            ++p;
            r-=termen ();
        }
    }

    return r;
}

int termen ()
{
    int r;

    for (r=factor (); *p=='*' || *p=='/'; )
    {
        if (*p=='*')
        {
            ++p;
            r*=factor ();
        }
        if (*p=='/')
        {
            ++p;
            r/=factor ();
        }
    }

    return r;
}

int factor ()
{
    int r;

    if (*p=='(')
    {
        ++p;
        r=eval ();
        ++p;
    }
    else
        for (r=0; isdigit (*p); ++p)
            r=r*10+*p-'0';

    return r;
}

int main ()
{
    freopen ("evaluare.in","r",stdin);
    freopen ("evaluare.out","w",stdout);

    fgets (s,DIM,stdin);
    printf ("%d",eval ());

    return 0;
}