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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		// your code goes here
  13. 		Scanner sc=new Scanner(System.in);
  14. 		int n=sc.nextInt();
  15.  
  16. 		int a[]=new int[n+1];
  17.  
  18. 		for(int i=1;i<=n;i++)
  19. 		a[i]=sc.nextInt();
  20.  
  21. 		int k=sc.nextInt();
  22.  
  23. 		Map<Integer,Integer> hash=new HashMap<>();
  24. 		hash.put(-1,0);
  25.  
  26.  
  27.  
  28. 		boolean found=false;
  29. 		for(int i=1;i<=n;i++)
  30. 		{
  31. 			if(hash.containsKey(a[i]))
  32. 			{
  33. 				if(i-hash.get(a[i])<=k)
  34. 				found=true;
  35. 				break;
  36. 			}
  37. 			hash.put(a[i],i);
  38. 		}
  39.  
  40. 		if(found)
  41. 				System.out.println("true");
  42. 				else
  43. 		System.out.println("false");
  44. 	}
  45. }
Success #stdin #stdout 0.13s 54516KB
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true
https://ideone.com/NOG8Uw
language:
Java (HotSpot 12)
created:
1 day ago
visibility:
public

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