#include <cstdio>
#include<string.h>
using namespace std;
char s[100010], *p=s;
//adunari/scaderi
int termen();
int factor();
int eval()
{
    int r=termen();
    while(*p=='+'||*p=='-')
    {
        if(*p=='+')
        {
            ++p;
            r+=termen();
        }
        else {
                ++p;
                r-=termen();
        }
    }
    return r;
}
//inmultiri/impartiri
int termen()
{
    int r=factor();
    while(*p=='*'||*p=='/')
    {
        if(*p=='*')
        {
            ++p;
            r*=factor();
        }
        else {
                ++p;
                r/=factor();
        }
    }
    return r;
}
//numar/expresie (caz in care se reapeleaza)
int factor()
{
    int 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);
    gets(s);
    printf("%d", eval());
    return 0;
}