Given a number N, we can create an N by N matrix as below:
1 2 3 4 5
16 17 18 19 6
15 24 25 20 7
14 23 22 21 8
13 12 11 10 9
In this case, N = 5, and the elements are in order from 1 to N2 as a clockwise spiral pattern.
Note that we always start from the upper left corner.
Now we have a sequence of numbers, please print the corresponding matrices.
A sequence of numbers, each number N indicates the size of matrix. (1 <= N <= 20)
The input is terminated by a newline '\n'.
The matrices corresponding to the input.
Use "%3d " to printf each element. Print a newline '\n' at the end of each row.