51Nod 1130 N的阶乘的长度 V2（斯特林近似）

题目链接

之前做的斯特林近似。就不说了

http://blog.csdn.net/qq_33193309/article/details/77803446

#include<iostream>#include<algorithm>#include<cstdio>#include<cstring>#include<cmath>#include<vector>#include<queue>using namespace std;double e=exp(1);int main(){int n;cin>>n;while(n--){int num;cin>>num;long long len=0.5*log10(2*M_PI*num)+num*log10(1.0*num/e);cout<<(long long int)len+1<<endl;}return 0;}