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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. using ll=long long;
  4.  
  5. int main() {
  6. 	// your code goes here
  7. 	ll n,k;
  8. 	cin>>n>>k;
  9. 	vector<ll>arr(n);
  10. 	for(ll i=0;i<n;i++){
  11. 		cin>>arr[i];
  12. 	}
  13. 	vector<pair<ll,ll>>b(2*n);
  14. 	ll u=0;
  15. 	for(ll i=0;i<n;i++){
  16. 		ll l=arr[i]-k;
  17. 		ll r=arr[i]+k;
  18. 		b[u].first=l;
  19. 		b[u].second=0;
  20. 		u++;
  21. 		b[u].first=r;
  22. 		b[u].second=1;
  23. 		u++;
  24. 	}
  25. 	ll c=0;
  26. 	sort(b.begin(),b.end());
  27. 	ll ans=0;
  28. 	for(ll i=0;i<b.size();i++){
  29. 		ll x=b[i].first;
  30. 		if(b[i].second==0){
  31. 			c++;
  32.  
  33. 			ans=max(ans,c);
  34. 		}
  35. 		else{
  36. 			c--;
  37. 		}
  38. 	}
  39. 	cout<<ans<<endl;
  40.  
  41. 	return 0;
  42. }
Success #stdin #stdout 0.01s 5292KB
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https://ideone.com/FOEtZe
language:
C++14 (gcc 8.3)
created:
3 days ago
visibility:
public

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