def is_pythag?(a, b, c)
  return c == Math.sqrt( a + b )
end

def is_1000_sum?(a, b, c)
  return c + a + b == 1000
end

def answer
  a = b = c = 1
  until is_pythag?(a, b, c) and is_1000_sum?(a, b, c)
  0..500.each do
    0..500.each do
      0..500.each do
        c += 1
      end
      b += 1
    end
    a += 1
  end
  return a * b * c
end