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  1. #include <iostream>
  2. using namespace std;
  3. int main() {
  4. 	int n;
  5. 	cin>>n;
  6. 	int a[n][n];
  7. 	for(int i=0; i<n; i++)
  8. 		for(int j=0; j<n; j++)
  9. 			cin>>a[i][j];
  10. 	int k=0;
  11. 	for(int i=0; i<n; i++)
  12. 	for(int j=0; j<n; j++)
  13. 		if(a[i][j]==1) k++;
  14. 	cout<<k/2;
  15.  
  16. }
Success #stdin #stdout 0.01s 5256KB
comments (?)
stdin
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5
0 0 1 0 0 
0 0 1 0 1 
1 1 0 0 0 
0 0 0 0 0 
0 1 0 0 0
stdout
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3
https://ideone.com/akZ7Nh
language:
C++14 (gcc 8.3)
created:
8 days ago
visibility:
public

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