Day 19 LeetCode

Day 19 Task:

7. Rotate Image: https://leetcode.com/problems/rotate-image/

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Solution Approach: https://leetcode.com/problems/rotate-image/solution/

Solutions:

class Solution:
    def rotate(self, matrix: List[List[int]]) -> None:
        """
        Do not return anything, modify matrix in-place instead.
        """
        
        def transpose(matrix):
            for i in range(len(matrix)):
                for j in range(i, len(matrix)):
                    matrix[i][j], matrix[j][i] = matrix[j][i], matrix[i][j]
                    
        def element_exchange(matrix):
            for i in range(len(matrix)):
                matrix[i] = matrix[i][::-1]
            matrix = matrix[::-1]
                
        transpose(matrix)
        element_exchange(matrix)