注释:
maxxx5x55555p.........................................................................ip.......................................................................................ip.......ip..........................................p.....................................................................................................................................................................xmaxmax5xmamaxx5xmamax5xmap......................................................................................................x5xxxp.........................................i p.............................................................mamamamamamaxmaxxmaxxmama55map...................................p...............................p.......................................................................................................................................................................................................................p.................................................................................ip..............................imamamaxxxmama
