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

int main()
{

    int rez=0;
    f>>sir;
    g<<aduna();
    return 0;
}