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题解 CF1196E Connected Component on a Chessboard Solution: 题解 CF1059E Split the Tree Solution: 题解 CF896C Willem, Chtholly and Seniorious（线段树解珂朵莉树）
题解 CF1196E Connected Component on a Chessboard
Solution: 题解 CF1059E Split the Tree
Solution: 题解 CF896C Willem, Chtholly and Seniorious（线段树解珂朵莉树）