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Problem 1002
这个爆炸让好多人挂了啊。。。
RoyYuan
| 2016-02-06 21:02:21
Author
细节决定一切啊手动苦笑
1219565550xiao
| 2016-02-06 21:08:00
# 1
n*(n-1)*(n-2)*(n-3)/24. 居然还是爆了,不开心QAQ
NotPassedCET4
| 2016-02-06 21:09:57
# 2
同爆。。。
RoyYuan
| 2016-02-06 21:11:50
# 3
还是要小心化简为妙啊23333
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