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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. 		int a[]=new int[n];
  16. 		int k=sc.nextInt();
  17. 		for(int i=0;i<n;i++)
  18. 		a[i]=sc.nextInt();
  19. 		boolean flag=false;
  20. 		// for(int i=0;i<n;i++)
  21. 		// {
  22. 		// 	for(int j=i+1;j<n;j++)
  23. 		// 	{
  24. 		// 		if(a[i]==a[j] && j-i<=k)
  25. 		// 		{
  26. 		// 			flag=true;
  27. 		// 			break;
  28. 		// 		}
  29.  
  30. 		// 	}
  31. 		// }
  32.  
  33.  
  34. 		//optmisation 
  35. 		Map<Integer,Integer> m=new HashMap<>();
  36. 		for(int i=0;i<n;i++)
  37. 		{
  38. 			if(m.containsKey(a[i]) && (i-m.get(a[i]))<=k)
  39. 			{
  40. 		// System.out.println("true");
  41. 		flag=true;
  42. 		break;
  43. 			}
  44.  
  45.  
  46. 		m.put(a[i],i);
  47. 		}
  48.  
  49.  
  50. 		System.out.println(flag);
  51.  
  52. 	}
  53. }
Success #stdin #stdout 0.15s 56348KB
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https://ideone.com/1wvsBt
language:
Java (HotSpot 12)
created:
11 days ago
visibility:
public

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