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  1. import java.util.HashSet;
  2. import java.util.Set;
  3.  
  4. public class Main
  5. {
  6.     public static void main(String[] args)
  7.     {
  8.         int[] test = {1, 2, 3, 4, 5, 5};
  9.         System.out.println(minRepeatIndex(test));
  10.  
  11.     }
  12.  
  13.     private static String minRepeatIndex(int[] test)
  14.     {
  15.         Integer minIndex = -1;
  16.         Set<Integer> elements = new HashSet<Integer>();
  17.         for(int i = test.length - 1; i >= 0; i--)
  18.         {
  19.             if(!elements.add(test[i]))
  20.             {
  21.                 minIndex = i;
  22.             }
  23.  
  24.         }
  25.         return minIndex.toString();
  26.     }
  27. }
Success #stdin #stdout 0.07s 2841600KB
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https://ideone.com/g8tl7H
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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