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摘要： CF1665A GCD vs LCM 题意 给定 \(n\)，求正整数 \(a, b, c, d\) 使得 \(gcd(a, b) = lcm(c, d)\) 且 \(a + b + c + d = n\) 输出任意一种即可 题解 显然，\(a = n - 3, b = c = d = 1\) 为一 阅读全文