Java
/**
Given a matrix A, return the transpose of A.
The transpose of a matrix is the matrix flipped over it's main diagonal, switching the row and column indices of the matrix.
Example 1:
Input: [[1,2,3],[4,5,6],[7,8,9]]
Output: [[1,4,7],[2,5,8],[3,6,9]]
Example 2:
Input: [[1,2,3],[4,5,6]]
Output: [[1,4],[2,5],[3,6]]
Note:
1 <= A.length <= 1000
1 <= A[0].length <= 1000
*/
public class Transpose_Matrix {
class Solution {
public int[][] transpose(int[][] A) {
if (A == null || A.length == 0) {
return A;
}
int m = A.length;
int n = A[0].length;
int[][] transPos = new int[n][m];
for (int i = 0; i < m; i++) {
for (int j = 0; j < n; j++) {
transPos[j][i] = A[i][j];
}
}
return transPos;
}
}
}Java
class Solution {
public int[][] transpose(int[][] A) {
int rows = A.length, columns = A[0].length;
int[][] transpose = new int[columns][rows];
for (int i = 0; i < rows; i++) {
for (int j = 0; j < columns; j++)
transpose[j][i] = A[i][j];
}
return transpose;
}
}