@[fujiaxu](/user/292502) ~~会都不会你问我~~
by KokiNiwa @ 2020-02-19 00:19:50
好像会超时
by NXYorz @ 2020-02-19 06:12:27
最好用动态规划
by Leoeight @ 2020-02-19 06:58:53
~~递推~~
by _Herobrine_ @ 2020-02-19 07:05:57
~~递推不香么~~
by Callous_Murder @ 2020-02-19 08:01:50
不是不行，但说实话不常用
by forlight @ 2020-02-19 08:08:16
~~用组合数它不香吗~~
by abc123_abc123 @ 2020-02-19 08:10:27
问的是路径条数
用DFS吧
by AT·小苏苏 @ 2020-02-19 08:11:01
@[fujiaxu](/user/292502) 可以用记忆化的bfs做。
怎么记忆化？当然是用map啦！
by impuk @ 2020-02-19 08:11:18
@[fujiaxu](/user/292502) 这题数学做法最简单
by 菜鸡gyf @ 2020-02-19 08:44:17