[kuangbin]专题二 搜索进阶 Eight II HDU - 3567【反向BFS】【康托展开】【哈希】
【题目描述】Eight-puzzle,whichisalsocalled“Ninegrids”,comesfromanoldgame.Inthisgame,youaregivena3by3boardand8tiles.Thetilesarenumberedfrom1to8andeachcoversagrid.Asyousee,thereisablankgridwhichcanberepresent