#include <cstdio>
#include <cctype>
using namespace std;
char s[100005],*p;
int evaluare();
int get_number()
{
    int aux=0;
    while (isdigit(*p)) aux=aux*10+(*p-'0'),p++;
    return aux;
}
int factor()
{
    int aux;
    if (*p=='(') p++,aux=evaluare(),p++;
    else aux=get_number();
    return aux;
}
int termen()
{
    int aux=factor();
    while (*p=='*' || *p=='/')
    {
        if (*p=='*') p++,aux*=factor();
        else p++,aux/=factor();
    }
    return aux;
}
int evaluare()
{
    int aux=termen();
    while (*p=='+' || *p=='-')
    {
        if (*p=='+') p++,aux+=termen();
        else p++,aux-=termen();
    }
    return aux;
}
int main()
{
    freopen("evaluare.in","r",stdin);
    freopen("evaluare.out","w",stdout);
    gets(s);
    p=s;
    printf("%d\n",evaluare());
    return 0;
}