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  1. #include<iostream>
  2. #include<vector>
  3. #include<algorithm>
  4. using namespace std;
  5. int main()
  6. {
  7. 	ios_base::sync_with_stdio(false);
  8. 	long long n;
  9. 	cin>>n;
  10. 	vector<long long int> a(n);
  11. 	for(int i=0;i<n;i++)
  12. 	cin>>a[i];
  13. 	sort(a.begin(),a.end());
  14. 	int k=0;
  15. 	while(k<n)
  16. 	{
  17. 		if(a[k]!=a[k+1]&&a[k]!=a[k-1])
  18. 		break;
  19. 		else if(a[k]==a[k+1])
  20. 		k+=2;
  21. 		else
  22. 		k++;
  23. 	}
  24. 	cout<<a[k];
  25. }
  26.  
Runtime error #stdin #stdout 0s 15240KB
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Standard input is empty
stdout
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Standard output is empty
https://ideone.com/VxwJF8
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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