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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 = { 4, 2, 2, 6, 4 };
  14.         int k = 6;
  15.  
  16.         System.out.println(subarrayXor(arr, k));
  17. 	}
  18. 	static int subarrayXor(int[]arr, int k){
  19. 		HashMap<Integer,Integer>map = new HashMap<>();
  20. 		int res = 0;
  21. 		int prefixXor = 0;
  22. 		for(int val:arr){
  23. 			prefixXor ^= val;
  24. 			if(k == prefixXor) {
  25. 				res++;
  26. 			}
  27. 			res+= map.getOrDefault(prefixXor ^ k,0);
  28.  
  29. 			map.put(prefixXor,map.getOrDefault(prefixXor,0)+1);
  30. 		}
  31. 		return res;
  32.  
  33. 	}
  34. }
Success #stdin #stdout 0.09s 54588KB
comments (?)
stdin 
Standard input is empty
stdout 
4
https://ideone.com/AdwPxK
language:
Java (HotSpot 12)
created:
2 days ago
visibility:
public

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