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