Spiral Order Matrix II

Given an integer n, generate a square matrix filled with elements from 1 to n2 in spiral order.


Given n = 3,

You should return the following matrix:

  [ 1, 2, 3 ],
  [ 8, 9, 4 ],
  [ 7, 6, 5 ]
NOTE: You only need to implement the given function. Do not read input, instead use the arguments to the function. Do not print the output, instead return values as specified. Still have a doubt? Checkout Sample Codes for more details.
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