#include <cstdio>

using namespace std;

const long N=100100;
char S[N],*p=S;

long termen();
long factor();

long eval()
{
    long r=termen();
    while(*p=='+' || *p=='-')
    {
        switch(*p)
        {
            case '+':
                ++p;
                r+=termen();
                break;
            case '-':
                ++p;
                r-=termen();
                break;
        }
    }
    return r;
}

long termen()
{
    long r=factor();
    while(*p=='*' || *p=='/')
    {
        switch(*p)
        {
            case '*':
                ++p;
                r*=factor();
                break;
            case '/':
                ++p;
                r/=factor();
                break;
        }
    }
    return r;
}

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

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

    fgets(S,N,stdin);
    printf("%ld\n",eval());
}