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Codeforces Round 943 (Div. 3 ABCDEFG1G2题) 视频讲解
A. Maximize? Problem Statement You are given an integer x x x. Your task is to find any integer y y y ( 1 ≤ y < x ) (1\le y<x) (1≤y<x) such that gcd ( x , y ) + y \gcd(x,y)+y gcd(x,y)+y is max
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