Problem - E - Codeforces題意: 給 N, M,求: 資料規模: The only line contains two integers n, m (1 ≤ n, m ≤ 1e13) — the parameters of the sum.解法: 首先觀察到 因此所求可以寫成 考慮比較簡單的這個問題: 這個的求法是基於平方分割,細節和這篇…
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