Sadly, the mathematical world is biased in favor of square matrices. As such, this challenge will help rectangular matrices by making them square.

For example, for the matrix:

[
  [1, 2],
  [3, 4],
  [5, 6]
]

This can be done by padding it with a column of zeroes on the right to get:

[
  [1, 2, 0],
  [3, 4, 0],
  [5, 6, 0]
]

While for the matrix:

[
  [1, 2, 3, 4],
  [5, 6, 7, 8]
]

One can pad it with two rows of zeros at the bottom to get:

[
  [1, 2, 3, 4],
  [5, 6, 7, 8],
  [0, 0, 0, 0],
  [0, 0, 0, 0]
]

Write a function that pads a rectangular matrix with zeros on the right or at the bottom to make it square.

Examples

completeSquare([
  [2, 5]
]) ➞ [
  [2, 5],
  [0, 0]
]

completeSquare([
  [2, 5],
  [1, 7]
]) ➞ [
  [2, 5],
  [1, 7]
]

completeSquare([
  [1, 2],
  [3, 4],
  [5, 6]
 ]) ➞ [
  [1, 2, 0],
  [3, 4, 0],
  [5, 6, 0]
]

Notes

• Matrices should be padded on the right or at the bottom, but not both simultaneously (i.e. the size of the biggest direction shouldn't change).
• If the input is already a square matrix, just return that matrix.