_RedForest @ 2018-12-21 17:28:44
五的阶乘里有两个2分别是 20 120
by Hallucination @ 2018-12-21 17:38:56
它应该是指答案中吧
by Hallucination @ 2018-12-21 17:39:28
@redforest
by _RedForest @ 2018-12-22 12:20:50
emmm我是大弱智