Pratik and Hopscotch

Pratik loves playing Hopscotch with his friends and he is very good at it. It's a game where you have to jump over tiles drawn with chalk on the ground. In this version of hopscotch, The first N natural numbers are drawn on the ground. Pratik's friends will randomly place him on a tile numbered K. Pratik has to jump from the present tile to the next-to-next tile and so on to reach the end, until h