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E. Unique Array You are given an integer array $a$ of length $n$. A subarray of $a$ is one of its contiguous subsequences (i. e. an array $[a_l, a_{l+ 阅读全文
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G - Mediator Problem Statement Beware the special input format and the smaller memory limit than usual. There is an undirected graph with vertices $1, 阅读全文
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G2. Division + LCP (hard version) This is the hard version of the problem. In this version $l\le r$. You are given a string $s$. For a fixed $k$, cons 阅读全文
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D2. Reverse Card (Hard Version) The two versions are different problems. You may want to read both versions. You can make hacks only if both versions 阅读全文
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Find All Possible Stable Binary Arrays II You are given 3 positive integers zero, one, and limit. A binary array arr is called stable if: The number o 阅读全文
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F - Subsequence LCM Problem Statement You are given a sequence of positive integers $A=(A_1,A_2,\dots,A_N)$ of length $N$ and a positive integer $M$. 阅读全文
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H. The Most Reckless Defense You are playing a very popular Tower Defense game called "Runnerfield 2". In this game, the player sets up defensive towe 阅读全文