#include <iostream>
using namespace std;

// ------------------------------------------------------------------
void binary_print(unsigned int n)
{
  if (n > 1) binary_print( n / 2 );
  cout << (n%2);
}

// ------------------------------------------------------------------
// Tool function
void binary_println(unsigned int n)
{
  cout << n << " : ";
  binary_print(n);
  cout << endl;
}

// -----------------------------------------------------------------
int main()
{
  // Test cases
  binary_println(0);
  binary_println(1);
  binary_println(2);
  binary_println(4);
  binary_println(64);
  binary_println(1024);
  binary_println(5);
  binary_println(7);
  binary_println(37);
  binary_println(42);
  binary_println(255);

  // General case
  cout << "un entier : ";
  unsigned int n(0);
  cin >> n;
  binary_println(n);

  return 0;
}