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  1. #include<cstdio>
  2. int main()
  3. {
  4. 	int N;
  5. 	scanf("%d",&N);
  6. 	long long A[101010];
  7. 	for(int i=0;i<N;i++)
  8. 		scanf("%lld",A+i);
  9. 	long long ans=0;
  10. 	int cnt=0;
  11. 	for(int j=62;j>=0;j--)
  12. 	{
  13. 		for(int i=cnt;i<N;i++)
  14. 		{
  15. 			if( A[i] & (1LL<<j) )
  16. 			{
  17. 				long long t=A[i];
  18. 				A[i]=A[cnt];
  19. 				A[cnt]=t;
  20. 				for(int k=0;k<N;k++)
  21. 					if(cnt!=k && (A[k] & (1LL<<j) ) )
  22. 						A[k]^=A[cnt];
  23. 				cnt++;
  24. 				break;
  25. 			}
  26. 		}
  27. 	}
  28. 	for(int i=0;i<cnt;i++)  ans^=A[i];
  29. 	printf("%lld",ans);
  30. }
Success #stdin #stdout 0s 4128KB
comments (?)
stdin 
3
1
2
4
stdout 
7
https://ideone.com/Xds7gG
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
public

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