分类
OI

Codeforces Contest #1325 解题报告 & 题目大意

A EhAb AnD gCd 题目大意 给定一个整数 $x(2\leq x \leq 10^9)$ 求 $a, […]

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OI

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OI

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OI

Codeforces Round #538 (Div. 2) 解题报告

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OI

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