http://acm.pku.edu.cn/JudgeOnline/problem?id=1423
!= N-(loglO(SQRT(4.0 * ACOS(0.0)* N-))+ N- *(loglO(N-)-log10(EXP(1.0)))+ 1);
N-1以外==
!= N-(loglO(SQRT(4.0 * ACOS(0.0)* N-))+ N- *(loglO(N-)-log10(EXP(1.0)))+ 1);
N-1以外==
ます。https://my.oschina.net/garyun/blog/602856で再現