#48

Rotate Image

medium· Math & Geometryruns: 0

You are given an n x n 2D matrix representing an image. Rotate the image 90 degrees clockwise in place. You must modify the input matrix directly without using an auxiliary 2D matrix.

wpm 0acc 100%time 0:000 / 285

class Solution:
    def rotate(self, matrix: list[list[int]]) -> None:
        n = len(matrix)
        for i in range(n):
            for j in range(i + 1, n):
                matrix[i][j], matrix[j][i] = matrix[j][i], matrix[i][j]
        for row in matrix:
            row.reverse()

click the box to focus · tab inserts 4 spaces · backspace to correct · esc to pause

desktop only

codedrill is a typing game and needs a real keyboard. open this on a laptop or desktop to practice.

you can still browse problems and sections from your phone.