#include<bits/stdc++.h>
#include"testlib.h"

const long long Nmin = 2, Nmax = 1'000'000'000'000'000LL;

int main(){
    registerValidation();
    long long N = inf.readLong(Nmin,Nmax);
    inf.readEoln();
    inf.readEof();
    return 0;
}