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Problem 1003
n个数字是1-n的排列吗
wemadefox
| 2015-10-03 19:35:10
Author
RT
140142
| 2015-10-03 19:35:47
# 1
相同元素算逆序吗?
序列2 2逆序是0对吧
admin
| 2015-10-03 19:36:36
# 2
n个数字不一定是1-n的排列吗 相同元素显然不是逆序
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