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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int n,l,k=0;
  6. 	cin>>n;
  7. 	for(int i=0;i<n;i++)
  8. 	{
  9. 		for(int j=0;j<n;j++)
  10. 		{
  11. 			cin>>l;
  12. 			if(l==1)
  13. 			{
  14. 				k++;
  15. 			}
  16. 		}
  17. 	}
  18. 	cout<<k/2;
  19. 	return 0;
  20. }
Success #stdin #stdout 0.01s 5456KB
comments (?)
stdin
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5
0 1 0 0 0 
1 0 1 1 0 
0 1 0 0 0 
0 1 0 0 0 
0 0 0 0 0
stdout
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3
https://ideone.com/NESDKi
language:
C++ (gcc 8.3)
created:
4 years ago
visibility:
public

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