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E - Hit and Away Problem Statement You are given a simple connected undirected graph $G$ with $N$ vertices and $M$ edges.The vertices and edges of $G$ 阅读全文
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F - Not Adjacent Problem Statement You are given a length-$N$ integer sequence $A=(A _ 1,A _ 2,\ldots,A _ N)$. There are $2 ^ N$ (not necessarily cont 阅读全文
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F - Clearance Problem Statement AtCoder Inc.'s online shop currently handles $N$ products, and the stock of product $i$ is $A_i$ units remaining. Proc 阅读全文
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E1. Prime Gaming (Easy Version) This is the easy version of the problem. The difference between the versions is that in this version, $m \le 2$. You c 阅读全文
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D. A Cruel Segment's Thesis You are given $n$ segments on a number line. The $i$-th segment is represented as $[l_i, r_i]$. Initially, all the segment 阅读全文
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Count Binary Palindromic Numbers You are given a non-negative integer n. A non-negative integer is called binary-palindromic if its binary representat 阅读全文