#include <iostream>
#include <fstream>

using namespace std;
ifstream f ("evaluare.in");
ofstream g ("evaluare.out");

int aduna();
int produs();
int exp();
string sir;
int i;

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;
}