Järjestys

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

typedef long long ll;

ll M=1e9+7;

void testi(){
	ll n, x;
	cin >> n >> x;
	vector<int> v;
	for (int i=1; i<=n; ++i){
		int a;
		cin >> a;
		v.push_back(a);
	}
	sort(v.rbegin(), v.rend());
	ll ans=1;
	for (int i=0; i<n; ++i){
		ll a=1;
		for (int j=0; j<i; ++j){
			if ((v[j]-v[i])<=x) a++;
		}
		ans = (ans*a)%M;
	}
	cout << ans << "\n";
}

int main(){
	int t;
	cin >> t;
	while (t--) testi();
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED

Test 3

Group: 2

Verdict: ACCEPTED