随笔分类 - 来源 - Codeforces
摘要：题目描述 An identity permutation of length \(n\) is an array \([1,2,3,\cdots,n]\). We performed the following operations to an identity permutation of len
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摘要：题目描述 You have an array \(a\) consisting of \(n\) distinct positive integers, numbered from \(1\) to \(n\) . Define \(p_k\) as \(p_k = \sum_{1 \le i, j
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摘要：题目描述 Manao came up with a solution that produces the correct answers but is too slow. You are given the pseudocode of his solution, where the function
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摘要：题目描述 By the age of three Smart Beaver mastered all arithmetic operations and got this summer homework from the amazed teacher: You are given a sequenc
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摘要：题目描述 You must have heard of the two brothers dreaming of ruling the world. With all their previous plans failed, this time they decided to cooperate w
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摘要：题目描述 You've got an array, consisting of nn integers: \(a_{1},a_{2},...,a_{n}\). Your task is to quickly run the queries of two types: Assign value \(x
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摘要：题目描述 Old MacDonald has a farm and a large potato field, \((10^{10}+1)\times(10^{10}+1)\) square meters in size. The field is divided into square garde
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摘要：题目描述 A process RAM is a sequence of bytes that are indexed from 1 to \(n\) . Polycarpus's program contains such instructions as "memset", that is, the
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摘要：题目描述 You are given an array aa consisting of \(n\) non-negative integers. You have to choose a non-negative integer \(x\) and form a new array \(b\) o
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摘要：题面 Given two integers \(n\) and \(x\), construct an array that satisfies the following conditions: for any element ai in the array, \(1\le ai<2^n\); t
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摘要：Problem - A Tomorrow is a difficult day for Polycarp: he has to attend \(a\) lectures and \(b\) practical classes at the university! Since Polycarp is
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