#include <iostream>
#include <string>
#include <vector>
using namespace std;
int main () {
int n, sum, msum;
cin >> n ;
vector <int> v(n);
vector <int> w ;
for (int& r: v) {
cin >> r;
sum += r;
}
msum = sum/n;
for (int i = 0; i < n; ++i) {
if ( v[i] > msum ) {
w.push_back(i);
}
}
cout << w.size() << endl;
for (int d: w) {
cout << d << " ";
}
return 0;
}
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