[Luogu 3469] [POI2008]BLO-Blockade Posted on 2019-02-23 | Edited on 2019-03-01 | In 题目分析 , Luogu 题目链接Luogu 3469 题目大意给定一张$n$个点$m$条边的联通无向图，问删除每个点后有多少点不连通。$n\le 10^5$，$m\le 5*10^5$ Read more »
[BZOJ 2671] Calc Posted on 2019-02-22 | In 题目分析 , BZOJ 题目链接BZOJ 2671 题目大意给出n，求出满足以下两个条件的数对(a,b)的数量$1. 1\le a<b \le n$ $2. (a+b)|(a*b)$ Read more »
[CF 662C] Binary Table Posted on 2019-02-22 | Edited on 2019-02-25 | In 题目分析 , CF 题目链接CF 662C 做法听说是一道tourist在考场上都没切的题，不过是真的想不到啊。。。 Read more »
[Luogu 4491] [HAOI2018]染色 Posted on 2019-02-20 | Edited on 2019-03-01 | In 题目分析 , Luogu 题目链接Luogu 4491 做法做反演题已经做到看到恰好就非常敏感了。 Read more »
[Luogu 3700] [CQOI2017]小Q的表格 Posted on 2019-02-10 | Edited on 2019-02-12 | In 题目分析 , Luogu 题目链接Luogu 3700 Read more »
[Luogu 4593] [TJOI2018]教科书般的亵渎 Posted on 2019-01-25 | Edited on 2019-01-26 | In 题目分析 , Luogu 题目链接Luogu 4593 Read more »
[Luogu 3643] [APIO2016] 划艇 Posted on 2019-01-24 | In 题目分析 , Luogu 题目链接Luogu 3643 题目大意给你一个长度为n的数列，数列第i项可以取$[l_i,r_i]$，或者不取，使得最后取的数单调递增，问方案数，若所有数均不取不计入方案。$n\le 500,l_i\le r_i\le 1e9$ Read more »