#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: wangyiyang
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/