#include <fstream>
#include <string>

using namespace std;
string sir;
int i;
ifstream f("evaluare.in");
ofstream g("evaluare.out");
int aduna();
int produs();
int exp();
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*=exp();
        }
        else
        {
            i++;
            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;
}