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[筆記] Leetcode - 867. Transpose Matrix

Posted on Edited on Symbols count in article: 602 Reading time ≈ 1 mins.

https://leetcode.com/problems/transpose-matrix/

Given a 2D integer array matrix, return the transpose of matrix.

The transpose of a matrix is the matrix flipped over its main diagonal, switching the matrix’s row and column indices.

Example 1:

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

Example 2:

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Input: matrix = [[1,2,3],[4,5,6]]
Output: [[1,4],[2,5],[3,6]]
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class Solution:
    def transpose(self, matrix: List[List[int]]) -> List[List[int]]:
        result = []

        for col in range(len(matrix[0])):
            new_matrix = []

            for row in range(len(matrix)):
                new_matrix.append(matrix[row][col])

            result.append(new_matrix)

        return result