Average Score Time Limit: 2 Seconds Memory Limit: 131072 KB Bob is a freshman in Marjar University. He is clever and diligent. However, he is not good at math, especially in Mathematical Analysis. After a mid-term exam, Bob was anxious about his…
Information Entropy Time Limit: 2 Seconds Memory Limit: 131072 KB Special Judge Information Theory is one of the most popular courses in Marjar University. In this course, there is an important chapter about information entropy. Entropy is…
转载请注明出处: http://www.cnblogs.com/fraud/ ——by fraud 下午在HDU上打了一下今年北京区域赛的重现,过了5题,看来单挑只能拿拿铜牌,呜呜. 先将这五题的题解放上来,剩余题目等搞出来再补上 A题 A Curious Matt Time Limit: 2000/2000 MS (Java/Others) Memory Limit: 512000/512000 K (Java/Others) Problem Description T…
Domination Time Limit: 8 Seconds Memory Limit: 131072 KB Special Judge Edward is the headmaster of Marjar University. He is enthusiastic about chess and often plays chess with his friends. What's more, he bought a large decorative chessboar…
2019~2020icpc亚洲区域赛徐州站H. Yuuki and a problem 题意: 给定一个长度为\(n\)的序列,有两种操作: 1:单点修改. 2:查询区间\([L,R]\)范围内所有子集和中没出现的最小正整数. 思路: 对于维护序列的问题大概率是数据结构的题目了,先确定一下题目的性质. 操作2需要我们提取\([l,r]\)范围内的值,这可以用主席树解决,同时需要带修,所以可以用树状数组套主席树完成. 确定是树套树后,考虑怎么维护操作2. 我们考虑一个节点,先看看能不能表示成1,如…