sapin.go
func (s *Sapin) GetLineSize(floor, line int) int {
	return 1 + line*2 + floor*4 + int(floor/2*2)*int((floor+1)/2)
}
func (s *Sapin) GetLineSize(floor, line int) int {
	return 1 + line*2 + floor*4 + int(floor/2*2)*int((floor+1)/2)
}
// GetLineSize returns the size of the sapin for a specified floor and line.