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  1. #include<cstdio>
  2. #include<iostream>
  3. using namespace std;
  4. #define MAX 2001
  5. #define rl(x) scanf("%d",&x)
  6. int main()
  7. {
  8.  
  9. 		int c=0,n;
  10. 		rl(n);
  11. 		string s[n];
  12. 		for(int i=0;i<n;i++)
  13. 			cin>>s[i];
  14. 		for(int k=0;k<n;k++)
  15. 		   for(int i=0;i<n;i++)
  16. 		       for(int j=0;j<n;j++)
  17. 			{
  18. 				if(s[i][j]=='0' && i!=j)
  19. 				{
  20.  
  21. 					if(s[i][k]&&s[k][j])
  22. 					{
  23. 					c++;
  24. 					s[i][j]='1',s[j][i]='1';
  25. 					}
  26. 				}
  27. 			}
  28. 		printf("%d\n",2*c);
  29.  
  30. }
Success #stdin #stdout 0s 2820KB
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stdin
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4

0111
1000
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1000
stdout
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6
https://ideone.com/9a6lNe
language:
C++ 4.3.2 (gcc-4.3.2)
created:
9 years ago
visibility:
public

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