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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int n,A[100100];
  5. int fun()
  6. {
  7. 	int ans=0;
  8. 	int count=0;
  9. 	for(int i=1;i<=n;i++)
  10. 	{
  11. 		if(A[i]==1)
  12. 		{
  13. 			count++;
  14. 			ans=max(ans,count);
  15. 		}
  16. 		else
  17. 		{
  18. 			count=0;
  19. 		}
  20. 	}
  21. 	return ans;
  22. }
  23.  
  24. int main() {
  25. 	cin>>n;
  26. 	int ans=0;
  27. 	for(int i=1;i<=n;i++)
  28. 	{
  29. 		cin>>A[i];
  30. 	}
  31. 	for(int i=1;i<=n;i++)
  32. 	{
  33. 		for(int j=1;j<=n;j++)
  34. 		{
  35. 			swap(A[i],	A[j]);
  36. 			ans=max(ans,	fun());
  37. 				swap(A[i],	A[j]);
  38.  
  39. 		}
  40. 	}
  41. 	cout<<ans<<endl;
  42.  
  43. 	return 0;
  44. }
Success #stdin #stdout 0s 15624KB
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https://ideone.com/LUhcH4
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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