Järjestys

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

const int P = 1e9 + 7;

signed main() {
  ios::sync_with_stdio(0);
  int t;
  cin >> t;
  while (t--) {
    int n, k;
    cin >> n >> k;
    vector<int> arr(n);
    for (int i=0; i<n; i++) cin >> arr[i];
    sort(arr.rbegin(), arr.rend());
    int ans = 1;
    for (int i=1; i<n; i++) {
      int cnt = 1;
      for (int j=0; j<i; j++) {
        cnt += arr[j] - arr[i] <= k;
      }
      ans = ans * cnt % P;
    }
    cout << ans << '\n';
  }
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED

Test 3

Group: 2

Verdict: ACCEPTED