摘要：一、代码： 1、求逆元（原理貌似就是拓展欧几里得，要求MOD是素数）： 2、底层优化（正确性未验证）： 3、扩栈，这玩意儿在OJ上用能防爆？ 4、神速读入fread 二、神牛blog matrix67 ZKW watashi 三、专题 动态规划系列： 数位dp模板 字符串系列： 【专辑】AC自动机 阅读全文

摘要：DescriptionKitty is a little cat. She is crazy about a game recently.There arenscenes in the game(mark from 1 ton). Each scene has a numberpi. Kitty's score will become least_common_multiple(x,pi) when Kitty enter theithscene.xis the score that Kitty had previous. Notice that Kitty will become m 阅读全文

摘要：DescriptionWhen it comes to theMaya Civilization, we can quickly remind of a term called the end of the world. It's not difficult to understand why we choose to believe the prophecy (or we just assume it is true to entertain ourselves) if you know the other prophecies appeared in theMaya Calenda 阅读全文

摘要：Problem DescriptionWhile studying the history of royal families, you want to know how wealthy each family is. While you have various 'net worth' figures for each individual throughout history, this is complicated by double counting caused by inheritance. One way to estimate the wealth of a f 阅读全文

摘要：Sereja has a sequence that consists ofnpositive integers,a1, a2, ..., an.First Sereja took a piece of squared paper and wrote alldistinctnon-empty non-decreasing subsequences of sequencea. Then for each sequence written on the squared paper, Sereja wrote on a piece of lines paper all sequences thatd 阅读全文

摘要：DescriptionAlicehasapianowhichcanplaysnicemusic,butit'sdifferentfromotherpianos.Ithastworowsofkeys,andthemethodofplayingitisalsoquitespecial.WhenAlice... 阅读全文