fork(3) download
copy 
  1. #include <iostream>
  2. using namespace std;
  3.  
  4. bool s[50][50];
  5.  
  6. int main() {
  7. 	int n;
  8. 	cin >> n;
  9. 	for(int i=0; i<n; i++)
  10. 	{
  11. 		s[0][i]=1;
  12. 		s[n-1][i]=1;
  13. 		s[i][n-1]=1;
  14. 	}
  15. 	int h=n-2, d=n-2;
  16. 	int pointx=n-1, pointy=0; 
  17. 	while(1)
  18. 	{
  19. 		for(int i=0; i<h; i++)
  20. 		{
  21. 			s[pointx-i][pointy]=1;
  22. 		}
  23. 		pointx-=h-1;
  24. 		h-=2;
  25. 		if(h<=0)
  26. 			break;
  27. 		for(int i=0; i<d; i++)
  28. 		{
  29. 			s[pointx][pointy+i]=1;
  30. 		}
  31. 		pointy+=d-1;
  32. 		d-=2;
  33. 		if(d<=0)
  34. 			break;
  35. 			for(int i=0; i<h; i++)
  36. 		{
  37. 			s[pointx+i][pointy]=1;
  38. 		}
  39. 		pointx+=h-1;
  40. 		h-=2;
  41. 		if(h<=0)
  42. 			break;
  43. 		for(int i=0; i<d; i++)
  44. 		{
  45. 			s[pointx][pointy-i]=1;
  46. 		}
  47. 		pointy-=d-1;
  48. 		d-=2;
  49. 		if(d<=0)
  50. 			break;
  51. 	}
  52. 	s[n/2][n/2]=0;
  53. 	for(int i=0; i<n; i++)
  54. 	{
  55. 		for(int j=0; j<n; j++)
  56. 		{
  57. 			cout << s[i][j];
  58. 		}
  59. 		cout << endl;
  60. 	}
  61. 	return 0;
  62. }
Success #stdin #stdout 0s 4544KB
comments (?)
stdin
copy 
5
stdout
copy 
11111
00001
11001
10001
11111
https://ideone.com/gWmjBI
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!