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Codeforces Round #528 (Div. 1, based on Technocup 2019 Elimination Round 4)B - Minimum Diameter Tree
時間 2020-12-30
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題目(假圖論): http://codeforces.com/contest/1086/problem/B 分析: https://www.cnblogs.com/dybala21/p/10171450.html 比如在這幅圖中: 實際上我們是讓鏈接任意兩條葉子結點的路徑的長度都相等,即,平均s到這所有距離葉子結點最近的邊上去(長度記爲L),(來自均值不等式的平均最小思想)。中間路徑
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