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  1. #include <iostream>
  2. #include <bits/stdc++.h>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	int n,k ; cin>>n>>k;
  7. 	vector<int>arr(n);
  8. 	for(int i = 0 ; i<n;i++){
  9. 		cin>>arr[i];
  10. 	}
  11. 	int count = 0 ; 
  12. 	for(int i =0;i<n;i++){
  13. 		for(int j = i +1;j<n;j++){
  14. 			if(abs(arr[i]-arr[j])==k)count++;
  15. 		}
  16. 	}
  17. 	cout<<count;
  18. 	// your code goes here
  19. 	return 0;
  20. }
Success #stdin #stdout 0s 5324KB
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stdin
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5 2
1 2 3 4 2
stdout
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3
https://ideone.com/Ht75xM
language:
C++ (gcc 8.3)
created:
21 hours ago
visibility:
public

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