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E. Moving Chips_DP

E. Moving Chips_DP

CFDP思维贪心有意思
D. Toss a Coin to Your Graph_二分答案+拓扑

D. Toss a Coin to Your Graph_二分答案+拓扑

CFgraph思维二分有意思图论拓扑
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

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