2018年9月4日
PAT 1086 Tree Traversals Again[中序转后序][难]
摘要： An inorder binary tree traversal can be implemented in a non-recursive way with a stack. For example, suppose that when a 6-node binary tree (with the 阅读全文
posted @ 2018-09-04 19:06 lypbendlf 阅读(152) 评论(0) 推荐(0) 编辑
PAT 1069 The Black Hole of Numbers[简单]
摘要： For any 4-digit integer except the ones with all the digits being the same, if we sort the digits in non-increasing order first, and then in non-decre 阅读全文
posted @ 2018-09-04 14:45 lypbendlf 阅读(11193) 评论(0) 推荐(0) 编辑
PAT 1114 Family Property[并查集][难]
摘要： This time, you are supposed to help us collect the data for family-owned property. Given each person's family members, and the estate（房产）info under hi 阅读全文
posted @ 2018-09-04 12:13 lypbendlf 阅读(179) 评论(0) 推荐(0) 编辑