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  1. import java.util.*;
  2. import java.lang.*;
  3.  
  4. class Main
  5. {
  6.     public static void main (String[] args) throws java.lang.Exception
  7. 	{
  8. 		int[] a = new int[] { 1, 2, 4 };
  9.         int[] b = new int[] {1, 3, 4, 1 };
  10.  
  11.         System.out.println( duplicates( a, a.length ));
  12.         System.out.println( duplicates( b, b.length ));
  13.  
  14. 	}
  15.  
  16.     public static boolean duplicates (int [] x, int numElementsInX ) {
  17.         Set<Integer> set = new HashSet<Integer>();
  18.         for ( int i = 0; i < numElementsInX; ++i ) {
  19.             if ( set.contains( x[i])) {
  20.                 return true;
  21.             }
  22.             else {
  23.                 set.add(x[i]);
  24.             }
  25.         }
  26.         return false;
  27.     }
  28.  
  29. }
Success #stdin #stdout 0.07s 380224KB
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false
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https://ideone.com/fQZXle
language:
Java (HotSpot 12)
created:
11 years ago
visibility:
public

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