An insect is trying to climb on a high finishing smooth wall. Because of the high finishing of the wall, the insect slips down sometimes. The target of the insect is high in the wall from its initial position. If we denote his motion upside by a positive integer and downside by a negative integer, answer the following:
If it crawls upside and then slips down by in one move, then in how many crawls and slips he will be able to reach his destination.