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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. long subarrayXor(vector<int> &arr, int k) {
  5.     // code here
  6.     int prefXor = 0;
  7.     long count = 0;
  8.     unordered_map<int, int> freq;
  9.  
  10.     for(int i : arr){
  11.     	prefXor ^= i;
  12.     	int temp = prefXor ^ k;
  13.     	if(prefXor == k) count++;
  14.  
  15.     	if(freq.find(temp) != freq.end()){
  16.     		count += freq[temp];
  17.     	}
  18.  
  19.     	freq[prefXor]++;
  20.     }
  21.  
  22.     return count;
  23.  
  24. }
  25.  
  26. int main() {
  27. 	// your code goes here
  28. 	vector<int> arr = {4, 2, 2, 6, 4};
  29. 	cout << subarrayXor(arr, 6);
  30. 	return 0;
  31. }
Success #stdin #stdout 0s 5324KB
comments (?)
stdin 
Standard input is empty
stdout 
4
https://ideone.com/hTmHOp
language:
C++14 (gcc 8.3)
created:
21 days ago
visibility:
public

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