#include <bits/stdc++.h>
using namespace std;
int main() {
  long long n, k;
  cin >> n >> k;
  int arr[200001];
  int isout[200001];
  for (int i = 1; i <= n; i++) {
    cin >> arr[i];
    isout[i] = 0;
  }
  long long res[200001];
  long long nn = n;
  long long lll = 1;
  long long kkk = 0;
  long long iii = 0;
  while (1) {
    long long i = iii;
    long long tt = kkk;
    int kk;
    for (kk = lll; kk <= n; kk++) {
      if (isout[kk] == 0) {
        ++i;
        res[kk] = tt - (i - 1) * (nn - i) * arr[kk];
        if (res[kk] < k) {
          iii = i - 1;
          kkk = tt;
          lll = kk + 1;
          cout << kk << endl;
          break;
        }
        tt += arr[kk] * (i - 1);
      }
    }
    if (kk == n + 1) {
      break;
    } else {
      isout[kk] = 1;
      nn--;
    }
  }
  return 0;
}
