Chef and step game

Chef is alone at home and he is now going to play a game in this game there is some steps that numbers from 0 to $N$ step. at the starting of game chef is on last step that is $N$th step . and the goal of chef is to reach the $0$th step at the end of game with minimum number of jump. - $Rule$ - If the given steps number is $even$ then chef is allowed to jump $N/2$ steps below at maximum - If