2013-2014 Petrozavodsk Winter Training Camp, Saratov SU Contest

Problem A

Unsolved.

Problem B

Solved by kblack, translated by zerol. 03:51 (+)

题意：双倍汉诺塔，规定最后同大小饼的顺序。

题解：正常移动一堆需要两倍正常汉诺塔的时间，而且会导致移动的最下两个饼反向，多消耗一些操作可以修正，但小一号的饼会反向，往上逐层处理，注意特判最顶上的情况。

zerol: 没我啥事，就打了个暴力。

Problem C

Solved by ultmaster. 01:16 (+)

Problem D

Unsolved.

Problem E

Solved by zerol. 00:32 (+)

题意：给若干个字符串，要求两两配对，使得每一对的最长公共前缀的长度和最大。

题解：全部插入一棵 trie，如果某个结点有超过两个字符串，就两两一对用掉，如果剩下一个的话就丢给父节点。

Problem F

Solved by kblack. 01:33 (+)

Problem G

Unsolved.

Problem H

Unsolved.

Problem I

Unsolved.

Problem J

Solved by kblack. 00:54 (+)

Problem K

Solved by ultmaster. 03:59 (+1)