I solved this two weeks ago as a joke: https://twitter.com/nomsolence/status/1228577284929421312 https://twitter.com/nomsolence/status/1228577284929421312 I t

I solved this two weeks ago as a joke: https://twitter.com/nomsolence/status/1228577284929421312 https://twitter.com/nomsolence/status/1228577284929421312 I think it's O(n!)?