线段数 [crayon-680cf8dbc2d57820625431/] 树状数组 [crayon-680cf8dbc2d5f371211413/] 洛谷P1972 [SDOI2009]HH的项链---树状数组 [crayon-680cf8dbc2d60582523552/]
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A.permutation [crayon-680cf8dbc64a2051749611/] B.Deque [crayon-680cf8dbc64ac873284255/] C.Book [crayon-680cf8dbc64ae106602405/] D.lines [crayon-680cf8dbc64b018265798…
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