#include <fstream>
#include <string>
using namespace std;
string sir;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
int produs();
int exp();
int i=0;

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;
        }

    }
}
int main()
{
    fin>>sir;
    fout<<aduna();
    return 0;
}