xiaofang3a的专栏

Problem DescriptionMaxwell is a naughty boy. One day, he fouled the white and clean wall with ink. Since his mother will come back home soon, Maxwell wanted to find a white convex polygon to cover

Problem DescriptionFat brother and Maze are playing a kind of special (hentai) game in the clearly blue sky which we can just consider as a kind of two-dimensional plane. Then Fat brother starts t