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  1.  
  2. import java.util.*;
  3. import java.lang.*;
  4. import java.io.*;
  5.  
  6. /* Name of the class has to be "Main" only if the class is public. */
  7. class Ideone
  8. {
  9. 	public static void main (String[] args) throws java.lang.Exception
  10. 	{
  11. 		// your code goes here
  12. 		int[] arr={1,1,2,2,2,1};
  13. 		HashMap<Integer,Integer> hm = new HashMap<>();
  14. 		int ans=0;
  15. 		for(int i =0;i<arr.length;i++){
  16. 		    if(hm.containsKey(arr[i])){
  17. 		        ans=Math.max(ans,i-hm.get(arr[i]));
  18. 		    }
  19. 		    else{
  20. 		        hm.put(arr[i],i);
  21. 		    }
  22. 		}
  23. 		System.out.print(ans);
  24. 	}
  25. }
Success #stdin #stdout 0.07s 52536KB
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5
https://ideone.com/Fea2mI
language:
Java (HotSpot 12)
created:
13 days ago
visibility:
public

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