#include <fstream>

using namespace std;
ifstream f("evaluare.in");
ofstream g("evaluare.out");
int produs();
int exp();
int i;
string sir;
int aduna ()
{
    int rez=produs();
    while (sir[i]=='+' || sir [i]=='-')
    {
         if (sir[i]=='+')
        {i++;
        rez=rez+produs();}
        else
        {
            i++;
            rez=rez-produs();
        }
    }
    return rez;
}
int produs ()
{
    int rez=exp();
    while (sir[i]=='*' || sir[i]=='/')
    {
        if (sir[i]=='*')
        {
            i++;
            rez=rez*exp();
        }
        else
        {
            i++;
            rez=rez/exp();
        }
    }
    return rez;
}
int exp ()
{
    int rez=0;
    if (sir[i]=='(')
    {
        i++;
        rez=aduna();
        i++;
    }
    else
    {
        while (sir[i]>='0' && sir[i]<='9')
        {
            rez=rez*10+(sir[i]-'0');
            i++;
        }
    }
    return rez;
}
int main()
{
    f>>sir;
    g<<aduna();
    return 0;
}