5671脑筋急转弯中等数值题short
At-Least-One Fixed Point Count
题目
Of the 120 permutations of the labels {1,2,3,4,5}, how many fix at least one label in its original position?
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
Of the 120 permutations of the labels {1,2,3,4,5}, how many fix at least one label in its original position?
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