Rotate Image

"""
Rotate the matrix by first transposing it (rows become columns),
then reversing each row to achieve a 90-degree clockwise rotation.
"""
class Solution:
    def rotate(self, arr: List[List[int]]) -> None:
        n=len(arr)
        for i in range(n):
            for j in range(n):
                if j>i: #it is needed othewise arr[0][1] will swap first with arr[1][0] and again arr[1][0] will swap with arr[0][1] so we have to swap once only.
                    arr[i][j],arr[j][i]=arr[j][i],arr[i][j]

        for i in range(n):
            arr[i]=list(reversed(arr[i]))

#Clean code for the same approach
class Solution:
    def rotate(self, matrix: List[List[int]]) -> None:
        transposed = list(zip(*matrix)) #*matrix will break matrix into the rows and then zip will take one element from each
        for i in transposed:
            print(i)
        ans=[list(reversed(i)) for i in transposed]
        matrix[:]=ans #to replace a 2d list with 2d list