Stirling公式： n！ sqrt(2n ) n^n ) e^ )-n )的值充分为atgdhmg
# include algorithm # include iostream # includes stream # includecstdlib # include cstdling # includeiomanip # include cstdio # include include include vector # include queue # include stack # include cmath # include list # include map # includeset # define SSS (a，a，b sizeof ) a ) ) definemem ) a ) memset ) a，0，sizeof ) a ) ) definess ) a，b ) ) )。 a ) definep(a ) printf(%dn '，a ) defineINF0x3f3f#definew ) a ) while(a ) a ) #definepiacos(-1.0 ) ) definew char ch； while (！ () (ch=getchar ) )='0'ch='9' )||ch=='-' ) ) if ) ch==eof ) res=INF； if(ch=='-' ) flag=1； elseif(ch='0'ch='9' ) res=ch-'0)； while((ch=Getchar ) ) )='0'ch='9' ) ) res=res*10 ch-'0)； res=flag？ -res:res； }voidmyp(inta ) if ) a9 ) myp ) a/10 )； putchar(a'0)； (() () () ) ) ) ) ) (() ) ) )、doublate ) )、doublate ) )。 (}int main ) ) {int cas，n； scanf('%d '，cas )； while(CAS----) scanf ) ' %d '，n )； if(n=1)打印(1(n )； ELSEprintf('%.0lfn '，stirling(n ) )； }return 0； }