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  1. #include <iostream>
  2. #include <set>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	       int i,t,n,m,b,x;
  7. 	       set<int> s;
  8. 	       set<int> ::iterator it;
  9. 	       cin>>t;
  10. 	       while(t--){   
  11. 	       	             b=0;
  12.  
  13. 	       	             cin>>n;
  14. 	       	             for(i=0;i<n;i++){
  15. 	       	                         cin>>x;
  16. 	       	                         s.insert(x);
  17. 	       	             }
  18. 	       	             for(it=s.begin();it!=s.end();it++){
  19. 	       	             	         b=b^(*it);
  20. 	       	             }
  21. 	       	             s.clear();
  22. 	       }
  23.  
  24. 	       return 0;
  25. }
Success #stdin #stdout 0s 15232KB
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https://ideone.com/ypeNGc
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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