摘要：
ultmaster 男神和小迷妹们玩起了捉迷藏的游戏。 小迷妹们都希望自己被 ultmaster 男神发现，因此她们都把自己位置告诉了 ultmaster 男神，因此 ultmaster 男神知道了自己去找每个小迷妹所要花的时间。 已知发现第 i 小迷妹得到的分数为 ai⋅tr（tr 为游戏剩余时间 阅读全文
摘要：
Waca loves maths,.. a lot. He always think that 1 is an unique number. After playing in hours, Waca suddenly realize that every integer can be represe 阅读全文
摘要：
As you might already know, Ada the Ladybug is a farmer. She grows a big fruit tree (with root in 0). There is a fruit on every node of the tree. Ada i 阅读全文