有种东西叫联通块，联通块里面所有的点答案肯定一样，先遍历一遍迷宫 by runtime_error @ 2018-12-29 20:01:25
@[runtime_error](/space/show?uid=92605) 懂你意思了，谢谢！ by si_zhong @ 2018-12-29 20:03:18