#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
const ll OO = 1e18;
int di[8] = {0, 0, 1, -1, -1, 1, -1, 1};
int dj[8] = {1, -1, 0, 0, 1, 1, -1, -1};
string ys = "YES", no = "NO";
const long double dgr = acos(-1) / 180, dg = 180 / acos(-1);
const int mod = 1e8 + 9, N = 2e5 + 5, M = 2001;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  ;
  ll n, k;
  cin >> n >> k;
  vector<int> v(n + 2);
  for (int i = 1; i <= n; i++) cin >> v[i];
  ll num = 0, sum = 0, d = 0;
  for (int i = 1; i <= n; i++) {
    if (d < k)
      cout << i << '\n';
    else {
      sum += (v[i] * num);
      num++;
    }
    d = sum - num * (n - i - 1) * v[i + 1];
  }
}
