在n的阶乘中数码a出现的次数
by hyh0174 @ 2024-01-29 21:57:39
120是5的阶乘,120里有一个数码1,一个数码2,一个数码0
by Kevin626 @ 2024-01-31 16:01:50
@[Kevin626](/user/1129659)
谢谢
by a15207081682 @ 2024-01-31 22:56:43