斐波那契查找

#include<iostream>
#include<cstdio>
using namespace std;
int arr[20];
void F(){
  arr[0]=0;
  arr[1]=1;
  for (int i=2; i<20; i++)
    arr[i]=arr[i-1]+arr[i-2];
}
int FibonacciSearch(int brr[], int n, int low, int high){
  F();
  int k=0;
  while (high+1>arr[k]-1){
    k++;    
  }
  for (int i=high; i<arr[k]-1; i++)
    brr[i]=brr[high];
  while (low<=high){
    int mid=low+arr[k-1]-1;
    if (brr[mid]>n){
      high=mid-1;
      k-=1;
    }
    else if (brr[mid]<n){
      low=mid+1;
      k-=2;
    }
    else{
      if (mid<=high)
        return high;
      else
        return high;
    }
  }
  return -1;
}
int main() {
  int brr[10], n;
  for (int i=0; i<5; i++)
    scanf("%d", &brr[i]);
  scanf("%d", &n);
  int k=FibonacciSearch(brr, n, 0, 4);
  printf("%d", k);
  return 0;
}