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

int main() {
	int n, k, d; cin >> n >> k >> d;
    vector <int> v(n+1);
    for(int i = 0; i < n; i++)  cin >> v[i];
    vector <int> ans;
    int l = v[0];
    ans.push_back(1);
    for(int i = 1; i < n; i++){
        if(v[i] - l >= d && v[i] + d <= v[k-1]){
            ans.push_back(i+1);
            l = v[i];
        }else{
            continue;
        }
    }
    l = v[k-1];
    ans.push_back(k);
    for(int i = k + 1; i < n; i++){
        if(v[i] - l >= d){
            ans.push_back(i+1);
            l = v[i];
        }
    }
    cout << ans.size() << '\n';
    for(int x : ans)    cout << x << ' ';
}