发现ans[u]+=(ll)(n2*siz[v])不行,要ans[u]+=(ll)n2*siz[v]

P3469 [POI2008] BLO-Blockade

(这不是显然吗(逃
by yijan @ 2018-10-25 11:43:45


woc,我就是这么错的
by countryhope_lzc @ 2019-03-07 16:19:12


谢谢大佬
by countryhope_lzc @ 2019-03-07 16:19:29


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