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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. 		int[] arr = {1,2,3,4,5,6,7,1};
  14. 		System.out.println("max distance is "+ maxDistanceOfSimilarElements(arr));
  15.  
  16. 	}
  17. 	static int maxDistanceOfSimilarElements(int []arr){
  18.  
  19. 		HashMap<Integer,Integer> map = new HashMap<>();
  20. 		int max = 0;
  21.  
  22. 		for(int i=0;i<arr.length;i++){
  23. 			if(!map.containsKey(arr[i])){
  24. 				map.put(arr[i],i);
  25. 			} else {
  26. 				max = Math.max(max,i-map.get(arr[i]));
  27. 			}
  28.  
  29. 		}
  30. 		return max;
  31. 	}
  32. }
Success #stdin #stdout 0.12s 55540KB
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Standard input is empty
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max distance is 7
https://ideone.com/ZUHJ9Y
language:
Java (HotSpot 12)
created:
13 hours ago
visibility:
public

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