摘要： 描述 Angel was caught by the MOLIGPY! He was put in prison by Moligpy. The prison is described as a N * M (N, M <= 200) matrix. There are WALLs, ROADs, 阅读全文

摘要： 描述 You're in space.You want to get home.There are asteroids.You don't want to hit them. You're in space.You want to get home.There are asteroids.You d 阅读全文

摘要： 描述 The doggie found a bone in an ancient maze, which fascinated him a lot. However, when he picked it up, the maze began to shake, and the doggie coul 阅读全文

摘要： Suppose that we have a square city with straight streets. A map of a city is a square board with n rows and n columns, each representing a street or a 阅读全文