Spiral Order Matrix II Interviewbit Solution

Problem: Spiral Order Matrix II

Problem Description:

Given an integer A, generate a square matrix filled with elements from 1 to A2 in spiral order.

Input Format:

The first and the only argument contains an integer, A.

Output Format:

Return a 2-d matrix of size A x A satisfying the spiral order.

Constraints:

1 <= A <= 1000

Examples:

Input 1:
  A = 3
 
 Output 1:
  [ [ 1, 2, 3 ],
  [ 8, 9, 4 ],
  [ 7, 6, 5 ]
  ]

Input 2:
  4
 
 Output 2:
  [ [1, 2, 3, 4],
  [12, 13, 14, 5],
  [11, 16, 15, 6],
  [10, 9, 8, 7]
  ]

Solution: