11 2019 档案
摘要:There are nn points in an array with index from 11 to nn, and there are two operations to those points. 1: 1 \ x1 x marking the point xx is not availa
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摘要:http://codeforces.com/problemset/problem/1252/H As you might already know, space has always been a problem in ICPC Jakarta. To cope with this, ICPC Ja
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