To be tested...

hacktest.cpp

#include <iostream>
#include <math.h>

/*
 * Complete the function below.
 */
int getIntegerComplement(int n) {

  if(n <= 0)
  {
      n = 0;
  }
  else if(n > 100000)
  {
      n = 100000;
  }

  int level = 1 + log(n) / log(2);

  int mask = (2 ^ level) - 1;

  return ~n & mask ;// & (0xEFFFFFFF);

}

int main()
{
  int number;
  std::cout << "Please type the number : " << std::endl;
  std::cin >> number;

  int level = 1 + log(number) / log(2);
  int mask = (2 ^ level) - 1;

  std::cout << "Log : " << level << std::endl;
  std::cout << "Complement : " << getIntegerComplement(number) << std::endl;
  std::cout << "Mask : " << mask << std::endl;

	return 0;


  int height;

  std::cout << "Please type the height : " << std::endl;
  std::cin >> height;

  if(height < 1)
  {
      height = 1;
  }
  else if(height > 100)
  {
      height = 100;
  }

  for(int row = 1; row <= height; ++row)
  {
      for(int col = 1; col <= height; ++col)
      {
          if(col < height - row + 1)
          {
              std::cout << " ";
          }
          else
          {
              std::cout << "#";
          }
      }
      std::cout << std::endl;
  }


	return 0;
}