在这里

TLE了三个点(#2,#3,#4)

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

int main() {
	long long a = 0, c = 0, d = 0;
	cin >> a >> c;
	long long b[a] = {0};

	for (long long  i = 0; i < a; i++) {

		cin >> b[i];
	}

	sort(b, b + a);

	for (long long i = a - 1; i >= 0; i--) {

		for (long long j = i - 1; j >= 0; j--) {

			if (b[i] - b[j] == c) {
				d++;
			}
		}
	}

	cout << d;
}