Transpose Matrix leetCode Problem

 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]]

Code 1:

class Solution {

    public int[][] transpose(int[][] matrix) {

       

         int rows = matrix.length; // Number of rows

        int cols = matrix[0].length; // Number of columns

       

        int[][] transposed = new int[cols][rows]; // Create a new matrix with swapped dimensions

        // Fill the transposed matrix

        for (int i = 0; i < rows; i++) {

            for (int j = 0; j < cols; j++) {

                transposed[j][i] = matrix[i][j]; // Swap rows and columns

            }

        }

        return transposed; // Return the new transposed matrix

    }

}

Code 2:

public class codefile{

    static List<List<Integer>> solve(List<List<Integer>>  input){

       

        int row=input.size();

        int col=input.get(0).size();

        List<List<Integer>> transpose =  new ArrayList<>();

        for(int i=0;i<col;i++)

        {

            transpose.add(new ArrayList<>());

        }

        for(int i=0;i<row;i++)

        {

            for(int j=0;j<col;j++)

            {

                transpose.get(j).add(input.get(i).get(j));

            }

        }

        return transpose;

    }

}