#include <fstream>
#define DIM 100010

using namespace std;
char a[DIM],*p=a;
ifstream f("evaluare.in");
ofstream g("evaluare.out");
long eval();
long termen();
long factor();
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;
}
long termen()
{
    long r;
    r=factor ();
    while(*p=='*' || *p=='/')
    {
        switch (*p)
        {
            case '*' :
                ++p;
                r *= factor();
                break;
            case '/':
                ++p;
                r/=factor();
                break;
        }
    }
    return r;
}
long eval()
{
    long r;
    r=termen();
    while(*p=='+' || *p=='-')
    {
        switch(*p)
        {
            case '+':
                ++p;
                r += termen();
                break;
            case '-':
                ++p;
                r-=termen();
                break;
        }
    }
    return r;
}
int main ()
{
    f.get(a,DIM);
    g<<eval()<<'\n';
    return 0;
}