Introduction - If you have any usage issues, please Google them yourself
Plane is a square divided into N* N a cell, which is surrounded by a wall, which has a slider and a pit, single
There may be a wall between the Cell. You can slide up and down in one direction around the slide, the slider is slid after each operation
We will continue to move toward the direction of the slide until it hits a wall or fall into the pit so far. How many times can slide the slider minimum pit ask slide
in.