#include<stdio.h> int main() { int n,i; double s=0,a[1000],b[1000]; a[0]=1.0;a[1]=2.0; b[0]=2.0;b[1]=3.0; scanf("%d",&n); for(i=0;i<n;i++) { if(i>=2) { a[i]=a[i-1]+a[i-2]; b[i]=b[i-1]+b[i-2]; } s=s+(b[i]/a[i]); } printf("%.6lf",s); return 0; } |
Double click to view unformatted code.