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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int n1,k;
  6. 	cin>>n1>>k;
  7. 	int A[n1];
  8. 	for(int i = 0 ; i<n1 ; i++){
  9. 		cin>>A[i];
  10. 	}
  11. 	sort(A,A+n1);
  12. 	int i = 0 , j = 1;
  13. 	int cnt = 0;
  14. 	while(j<n1){
  15. 		int d = A[j]-A[i];
  16. 		while(d>k){
  17. 		   	i++;
  18. 		   	d = A[j]-A[i];
  19. 		}
  20. 		cnt += (j-i);
  21. 		j++;
  22. 	}
  23. 	cout<<cnt<<endl;
  24. 	return 0;
  25. }
  26.  
Success #stdin #stdout 0s 5316KB
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stdin
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3 2 
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stdout
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3
https://ideone.com/xWD54v
language:
C++14 (gcc 8.3)
created:
4 days ago
visibility:
public

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