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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 arr[] = new int[n];
  16. 		for(int i=0; i<n ;i++){
  17. 			arr[i] = sc.nextInt();
  18. 		}
  19.  
  20. 		int max =0;
  21. 	    HashMap<Integer,Integer> map = new HashMap<>();
  22.  
  23. 	    for(int i=0; i<n; i++){
  24. 	        if(map.containsKey(arr[i])){
  25. 	            int diff = i - map.get(arr[i]);
  26. 	            if(diff>max)
  27. 	                max=diff;
  28. 	        }
  29. 	        else{
  30. 	            map.put(arr[i],i);
  31. 	        }
  32. 	    }
  33. 	    System.out.println(max);
  34. 	}
  35. }
Success #stdin #stdout 0.17s 54480KB
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https://ideone.com/h4Rwqz
language:
Java (HotSpot 12)
created:
15 days ago
visibility:
public

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