5667脑筋急转弯中等数值题short
Hat-Check Derangement Count
题目
Six guests check distinct hats. The attendant returns the hats in a random order. In how many of the possible return orderings does no guest receive their own hat?
解题计时
0:00
提交作答时记录，用于后续平均用时统计。
你的答案
题目
Six guests check distinct hats. The attendant returns the hats in a random order. In how many of the possible return orderings does no guest receive their own hat?
解题计时
0:00
提交作答时记录，用于后续平均用时统计。
你的答案