http://www.ospn.jp/osc2007-do/

http://www.acm-japan.org/past-icpc/domestic2006/contest/all_ja.html#section_D {- http://www.acm-japan.org/past-icpc/domestic2006/contest/all_ja.html#section_D 2007.06.12 nisikawa -} import Data.Maybe (fromJust) import Data.List (find, zipW…