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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. 	string ans="YES";
  11. 	for(int i=0; i<n; i++){
  12. 		if(a[i][i]!=0) ans="NO";
  13. 		for(int j=0; j<n; j++)
  14. 			if(a[i][j]!=a[j][i]) ans="NO";
  15. 		}
  16. 	cout<<ans;
  17.  
  18. }
Success #stdin #stdout 0.01s 5280KB
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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YES
https://ideone.com/P4QYZR
language:
C++14 (gcc 8.3)
created:
8 days ago
visibility:
public

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