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2021.5.28 Codeforces Round #723 Div. 2A. Mean Inequality题目InputOutput分析题意上代码反思B. I Hate 1111题目InputOutput分析题意上代码反思A. Mean Inequality题目You are given an array a of 2n distinct integers. You want to arrange the elements of the array in a circle such that n

2021.5.24 Codeforces Round #722 Div. 2A. Eshag Loves Big Arrays题目InputOutput分析题意上代码B. Sifid and Strange Subsequences题目InputOutput分析题意上代码反思D. Kavi on Pairing Duty题目分析题意上代码反思A. Eshag Loves Big Arrays题目Eshag has an array a consisting of n integers.Eshag c

2021.5.20 Codeforces Round #721 Div. 2A. And Then There Were K题目InputOutput分析题意上代码反思B1. Palindrome Game (easy version)题目InputOutput分析题意上代码反思A. And Then There Were K题目Given an integer n, find the maximum value of integer k such that the following conditi

2021.5.7 codeforce div2A. Nastia and Nearly Good Numbers题目分析题意反思B. Nastia and a Good Array题目分析题意反思A. Nastia and Nearly Good Numbers题目Nastia 有两个正整数A和B，她定义：1.当一个整数被A*B整除时，它是好数；2.否则，当这个整数被A整除时，它是 近似好数；给出A和B，要求给出三个不同的正整数x、y、z满足x+y=z且其中一个数是好数，另外两个是 近似好数。