#include <fstream>
#define NMAX 100010
using namespace std;
ifstream f("evaluare.in");
ofstream g("evaluare.out");
char a[NMAX],*p;
int expresie();
int termen();
int factor();
int numar()
{
    int nr=0;
    while(*p>='0' && *p<='9')
    {
        nr=nr*10+ (*p-'0');
        p++;
    }
    return nr;
}
int expresie()
{
    int r=0;
    r=termen();
    while(*p=='+' || *p=='-')
    {
        if(*p=='+')
        {
            p++;
            r+=termen();
        }
        else if(*p=='-')
        {
            p++;
            r-=termen();
        }
    }
    return  r;
}
int termen()
{
    int r=0;
    r=factor();
    while( *p=='*' || *p=='/')
    {
        if(*p=='*')
        {
            p++;
            r*=factor();
        }
        else if(*p=='/')
        {
            p++;
            r/=factor();
        }
    }
    return r;
}
int factor()
{
    int r=0;
    if(*p=='(')
    {
        p++;
        r=expresie();
        p++;
    }
    else{
        r=numar();
    }
    return r;
}
int main()
{
    f>>a;
    p=a;
    g<<expresie();
    g.close();
    return 0;
}