_sunshine

摘要： Pre-Post-erous!Time Limit: 1000MSMemory Limit: 10000KTotal Submissions: 1915Accepted: 1158DescriptionWe are all familiar with pre-order, in-order and post-order traversals of binary trees. A common problem in data structure classes is to find the pre-order traversal of a binary tree when given the i 阅读全文

摘要： Tree RecoveryTime Limit: 1000MSMemory Limit: 65536KTotal Submissions: 7997Accepted: 5079DescriptionLittle Valentine liked playing with binary trees very much. Her favorite game was constructing randomly looking binary trees with capital letters in the nodes. This is an example of one of her creation 阅读全文

摘要： BalanceTime Limit: 1000MSMemory Limit: 30000KTotal Submissions: 7086Accepted: 4264DescriptionGigel has a strange "balance" and he wants to poise it. Actually, the device is different from any other ordinary balance. It orders two arms of negligible weight and each arm's length is 15. S 阅读全文