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Algorithm Challenge Available At CodeFights

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Given a rectangular matrix and an integer column, return an array containing the elements of the columnth column of the given matrix (the leftmost column is the 0th one).

Example

For matrix = [[1, 1, 1, 2], [0, 5, 0, 4], [2, 1, 3, 6]]

      and column = 2, the output should be
      extractMatrixColumn(matrix, column) = [1, 0, 3].

Hints

• push()

Input/Output

• [execution time limit] 5 seconds (ts)
• [input] array.array.integer matrix 2-dimensional array of integers representing a rectangular matrix.

Guaranteed constraints: 1 ≤ matrix.length ≤ 4, 1 ≤ matrix[0].length ≤ 4, 0 ≤ matrix[i][j] ≤ 300.

• [input] integer column An integer not greater than the number of matrix columns.

Guaranteed constraints: 0 ≤ column ≤ matrix[i].length - 1.

• [output] array.integer