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

Example 2:
Input: matrix = [[1,2,3],[4,5,6]]
Output: [[1,4],[2,5],[3,6]]

Constraints:
m == matrix.length
n == matrix[i].length
1 <= m, n <= 1000
1 <= m * n <= 105
-109 <= matrix[i][j] <= 109
"""
import numpy as np


def transpose(matrix: list[list[int]]) -> list[list[int]]:
    return np.transpose(matrix).tolist()


def transpose(matrix: list[list[int]]) -> list[list[int]]:
    rows, cols = len(matrix), len(matrix[0])
    res = [[0] * rows for _ in range(cols)]
    for r in range(rows):
        for c in range(cols):
            res[c][r] = matrix[r][c]
    return res
