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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	// your code goes here
  6. 	int n;
  7. 	cin>>n;
  8. 	int k;
  9. 	cin>>k;
  10. 	int arr[n];
  11. 	for(int i=0;i<n;i++)
  12. 	{
  13. 		cin>>arr[i];
  14. 	}
  15. 	sort(arr,arr+n);
  16. 	int i=0,j=0,d,count=0;
  17.  
  18. 	while(i<n && j<n)
  19. 	{
  20.  
  21. 		d=arr[j]-arr[i];
  22. 		while(d>k)
  23. 		{
  24. 			i++;
  25. 			d=arr[j]-arr[i];
  26. 		}
  27. 		count+=j-i+1;
  28. 		j++;
  29. 	}
  30. 	cout<<count-n;
  31. 	return 0;
  32. }
Success #stdin #stdout 0s 5288KB
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stdin
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3 1 
2 3 1
stdout
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2
https://ideone.com/v4WAYK
language:
C++ (gcc 8.3)
created:
8 days ago
visibility:
public

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