// Program to calculate 2**n
using namespace std;
#include <iostream>
#include <cmath>
int main()
{
  int  int1, int2, int3;
  // print to screen
  cout << "Read in the exponential N for 2^N =\n";    
  // read from screen
  cin >> int2; 
  int1 = (int) pow(2., (double) int2);
  cout << " 2^N * 2^N = " << int1*int1 << "\n";
  int3 = int1 - 1;
  cout << " 2^N*(2^N - 1) = " << int1 * int3  << "\n";
  cout << " 2^N- 1 = " << int3  << "\n";
  return 0;
}