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- #include <iostream>
- using namespace std;
- int main()
- {
- int n, k;
- cin >> n >> k;
- int a[n];
- for(int i = 0; i < n; i++) {
- cin >> a[i];
- }
- long long dobri = 0;
- for(int i = 0; i < n; i++) {
- for(int j = i + 1; j < n; j++) {
- if(abs(a[i] - a[j]) == k) {
- dobri += 1;
- }
- }
- }
- cout << dobri << endl;
- return 0;
- }
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