nefu fibs的位数 461 (矩阵)

Memory Limit : 65536K

source

#include<stdio.h>
#include<string.h>
#include<math.h>
#include<algorithm>
#define ll long long
using namespace std;
int main()
{
	ll a,b,u,v,n;
	while(scanf("%lld%lld%lld%lld%lld",&n,&a,&b,&u,&v)!=EOF)
	{
		double c=sqrt(u*u+4*v);
		double x=(u+c)/2.0;
		double y=(u-c)/2.0;
		double ans=n*log10(x)+log10(b-y*a)-log10(c);
		printf("%lld\n",(ll)ans+1);
	}
	return 0;
}