Arpa’s letter-marked tree and Mehrdad’s Dokhtar-kosh paths CodeForces - 741D【dsu on tree+异或】 - Code World

Arpa’s letter-marked tree and Mehrdad’s Dokhtar-kosh paths CodeForces - 741D【dsu on tree+异或】

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Origin www.cnblogs.com/1024-xzx/p/12601056.html

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