" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
HP: {-4,-3,-2,-1,...}
x ≤ 4
HP: {4,3,2,1,...}
HP = {-4,-3,-2,-1,0,1,2,3,4} D