#include <iostream>
#include <cmath>

int main()
{
  double a=6.0; 
  int b=9; 
  bool test = true;

  if(test)
    {
      double a = sqrt(b);
      cout << a << endl;
      b = 6;
    }

  cout << a << endl;

  for(int b=0;b<2;++b)
    cout << b << endl;
    
  cout << b << endl;

  return 0;
}