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Codeforces894d ralph and his tour in binary country

标签：二分，树 题目 题目传送门 Ralph is in the Binary Country. The Binary Country consists of n cities and (...

Posted by yjjr's blog on February 6, 2018

Codeforces894c marco and gcd sequence

标签：模拟，数学 题目 题目传送门 In a dream Marco met an elderly man with a pair of black glasses. The man to...

Posted by yjjr's blog on February 6, 2018

Codeforces894b ralph and his magic field

标签：数学，快速幂 题目 题目传送门 Ralph has a magic field which is divided into n × m blocks. That is to say,...

Posted by yjjr's blog on February 6, 2018

Codeforces894a qaq

标签：模拟 #题目 题目传送门 “QAQ” is a word to denote an expression of crying. Imagine “Q” as eyes with te...

Posted by yjjr's blog on February 6, 2018

Codeforces869e the untended antiquity

标签：模拟，标记法 Koyomi is helping Oshino, an acquaintanceof his, to take care of an open space aro...

Posted by yjjr's blog on February 6, 2018

Codeforces869c the intriguing obsession

标签：数学 — This is not playing but duty as allies ofjustice, Nii-chan! — Not allies but just...

Posted by yjjr's blog on February 6, 2018

Codeforces869b the eternal immortality

标签：模拟，数学 Even if the world is full of counterfeits,I still regard it as wonderful. Pile u...

Posted by yjjr's blog on February 6, 2018

Codeforces869a the artful expedient

标签：模拟 Rock... Paper! After Karen have found the deterministicwinning (losing?) strategy f...

Posted by yjjr's blog on February 6, 2018

Codeforces868f yet another minimizationproblem

标签：二分，DP You are given an array ofn integersa1... an. The cost of a subsegment is thenumber ...

Posted by yjjr's blog on February 6, 2018

Codeforces868d huge strings

标签：记忆化搜索，模拟，位运算 You are given n stringss1, s2, ..., sn consisting of characters 0 and 1.m op...

Posted by yjjr's blog on February 6, 2018

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