func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int count = 0;     int n, d;     cin >> n >> d;     int arr[n];     for (int i = 0; i < n; i++) cin >> arr[i];     for (int i = 0; i < n; i++) {       for (int j = 0; j < n; j++) {         if (i == j) continue;         if (abs(arr[i] - arr[j]) <= d) count++;       }     }     cout << count << endl;   }   