#include <bits/stdc++.h>   using namespace std;   long long rate[2000002];   int n, k;   int main() {     cin >> n >> k;     for (int i = 0; i < n; i++) cin >> rate[i];     long long p = 0, c;     int del = 0;     vector<int> vec;     for (int i = 1; i <= n; i++) {       if (i - del > 1)         c = (-rate[i - 1] * ((n - del) - (i - del))) * (i - del - 1) + p;       else         c = 0;       if (c < k)         del++, vec.push_back(i);       else         p += rate[i - 1] * (i - del - 1);     }     for (int i = 0; i < vec.size(); i++) cout << vec[i] << endl;     return 0;   }   