H2. Maximum Crossings (Hard Version)_差分树状数组+思维转化

H2. Maximum Crossings (Hard Version)_差分树状数组+思维转化

CF线段树&ampBIT前缀和树状数组图论
C. Rooks Defenders_BIT

C. Rooks Defenders_BIT

CF线段树&ampBIT树状数组思维有意思线段树
F2. Promising String (hard version)_BIT正序对+离散化+同余分组

F2. Promising String (hard version)_BIT正序对+离散化+同余分组

CF线段树&ampBIT离散化思维树状数组

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