emmm......

P1465 [USACO2.2] 序言页码 Preface Numbering

@[七喜](/space/show?uid=93862) ``可表示为5x10n的字符(V,L,D)从不连续出现。`` 所以不是CDD(D连续出现了QAQ)
by PrincessQi @ 2019-02-03 09:47:50


|