Transpose matrix

Array Matrix Simulation

75.9% acceptance

Feb 22, 2026

4168

459

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.

Solution

Rust

Time O(n)

Space O(1)

LeetCode

solution.rs

/*
 * 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
 */

impl Solution {
  pub fn transpose(matrix: Vec<Vec<i32>>) -> Vec<Vec<i32>> {
    let r = matrix.len();
    let c = matrix[0].len();
    (0..c).map(|j| (0..r).map(|i| matrix[i][j]).collect()).collect()
  }
}