// Demonstration of time and big-Os
#include <iostream>
#include <cmath>
#include <cstdlib>

using namespace std;

double f(int t, int n)
{
  if(t==1)
   return n;
  else if(t==2)
   return n*n/5.0;
  else
   return exp(n)/25.0;
}

int main()
{
    int N;
    cout << "N=?";  cin >> N;

    for(int i=1; i<=3; i++)
    {
      sleep(f(i,N));
      cout << i << "\t" << f(i,N) << endl;
    }

    cout << '\007' << endl;

    return 0;

}