迷宫游戏有多种。有的迷宫只要你能走出来就算成功；有的是要求不但能走出来，而且走的步数越少得分越高。为了能得到高分，你肯定在路线的选择上下功夫，尽量用最少的步数走出迷宫。任务是，计算出走出迷宫需要的最少步数是多少？-There are a variety of maze game. Some maze as long as you can come out even if successful　some requirements will not only come out, but the fewer number of steps to go higher the score. In order to get a high score, you must work hard in the choice of the route, with the least possible number of steps out of the maze. Task is to calculate the minimum number of steps out of the maze need is how much?