n = int(input('Enter size of matrix: '))
dx, dy = 1,0
x, y = 0,0
spiral_matrix = [[None] * n for j in range(n)]
for i in range(n ** 2):
	spiral_matrix[x][y] = i
	nx, ny = x + dx, y + dy
	if 0 <= nx < n and 0 <= ny < n and spiral_matrix[nx][ny] == None:
		x, y = nx, ny
	else:
		dx, dy = -dy, dx
		x, y = x + dx, y + dy
for y in range(n):
	for x in range(n):
		print("%02i" % spiral_matrix[x][y], end=' ')
	print()
print(spiral_matrix)
print()
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