2019年10月11日

TZOJ 3522 Checker Challenge(深搜)

摘要： 描述 Examine the 6x6 checkerboard below and note that the six checkers are arranged on the board so that one and only one is placed in each row and each 阅读全文

posted @ 2019-10-11 10:45 大桃桃 阅读(137) 评论(0) 推荐(0) 编辑

TZOJ 4292 Count the Trees(树hash)

摘要： 描述 A binary tree is a tree data structure in which each node has at most two child nodes, usually distinguished as "left" and "right". A subtree of a 阅读全文

posted @ 2019-10-11 09:46 大桃桃 阅读(178) 评论(0) 推荐(0) 编辑

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