C programming.

Suppose you are playing a special game of hopscotch on a line of integer numbers drawn on the ground like so:

The number, with a square around it, indicates where you are currently standing. You can move left or right down the line by jumping the number of spaces indicated by the number you are standing on. So if you are standing on a 4, you can jump either left 4 spaces or right 4 spaces. You cannot jump past either end of the line. For example, the first number (4) only allows you to jump right, since there are no numbers to the left that you can jump to. The goal: you want to get to the 0 at the far end (right side) of the line. You are also guaranteed that there will be only one zero, which, again, will be at the far right side.