fork download
copy 
  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int T;
  6. 	cin>>T;
  7. 	while(T--){
  8. 		int N;cin>>N;
  9. 		int arr[N+1];
  10. 		for(int i =0 ; i < N; i++)cin>>arr[i];
  11. 		for(int i = 0 ; i < N; i++){
  12. 			int a = 0;
  13. 			for(int j = 0; j < N; j++){
  14. 				if(i == j) continue;
  15. 				a ^= arr[j];
  16. 			}
  17. 			if(arr[i] == a) {cout<<arr[i]<<'\n'; break;}
  18. 		}
  19. 	}
  20. 	return 0;
  21. }
Success #stdin #stdout 0.01s 5492KB
comments (?)
stdin
copy 
4
4
4 3 2 5
5
6 1 10 7 10
6
6 6 6 6 6 6
3
100 100 0
stdout
copy 
4
6
6
100
https://ideone.com/F7oxkR
language:
C++14 (gcc 8.3)
created:
1 year ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!