#include <fstream>
using namespace std;
const int N=100003;
ifstream f("evaluare.in");
ofstream g("evaluare.out");
char v[N],*p=v;

int termen();
int factor();

int getnr()
{
    int nr=0;
    while(*p>='0'&&*p<='9')
    {
        nr=nr*10+(*p-'0');
        p++;
    }
    return nr;
}
int eval()
{
    int r=termen();
    while(*p=='+' || *p=='-'){

        if(*p=='+')
        {
            p++;
            r+=termen();
        }
        else
        {
            p++;
            r-=termen();
        }
    }
    return r;
}

int termen()
{
    int r=factor();
    while(*p=='*' || *p=='/')
    {
        if(*p=='*')
        {
            p++;
            r*=factor();
        }
        else
        {
            p++;
            r/=factor();
        }
    }
    return r;
}

int factor()
{
    int r=0;
    if(*p=='(')
    {
        p++;
        r=eval();
        p++;
    }
    else
        r=getnr();

    return r;
}
int main()
{
    f>>v;
    g<<eval();
    f.close();
    g.close();
    return 0;
}