#include<bits/stdc++.h>
using namespace std;


int main() {
	int n,a[20],mi = 0,ma = 0;
	cin>>n;
	int i;
	for(i = 0; i < n; i++) {
		cin>>a[i];
		if(a[i] < a[mi]){
			mi = i;
		}
		
		if(a[i] > a[ma]){
			ma = i;
		}
	}
	
	cout<<a[ma]-a[mi]<<endl;
	for(i = 0; i < n; i++) {
		if(a[i] == a[mi]){
			cout<<i+1<<" ";
		}
	}
	
}

/**************************************************************
	Problem: 1818
	User: admin
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/