#include<bits/stdc++.h>
using namespace std;
 
 
int main() {
    int n,a[20],p;
    cin>>n;
    int i;
    for(i = 0; i < n; i++) {
        cin>>a[i];
    }
    for(i = 3;i < n;i++){
        if(a[i] != a[i-1]+a[i-2]){
            p = i+1;
            break;
        }
    }
     
    for(i = p-1;i<n;i++){
        a[i]=a[i-1]+a[i-2];
    }
     
    cout<<p<<endl;
    for(i = 0; i < n; i++) {
        cout<<a[i]<<" ";
    }
}
/**************************************************************
	Problem: 1816
	User: wangyiyang
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/