g0001_0100.s0048_rotate_image.Solution.py Maven / Gradle / Ivy

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104 LeetCode algorithm problem solutions

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# #Medium #Top_100_Liked_Questions #Top_Interview_Questions #Array #Math #Matrix
# #Data_Structure_II_Day_3_Array #Programming_Skills_II_Day_7 #Udemy_2D_Arrays/Matrix
# #Big_O_Time_O(n^2)_Space_O(1) #2024_06_08_Time_26_ms_(98.93%)_Space_16.5_MB_(91.88%)

class Solution:
    def rotate(self, matrix: List[List[int]]) -> None:
        """
        Do not return anything, modify matrix in-place instead.
        """
        n = len(matrix)
        for i in range(n // 2):
            for j in range(i, n - i - 1):
                positions = [
                    [i, j],
                    [j, n - 1 - i],
                    [n - 1 - i, n - 1 - j],
                    [n - 1 - j, i]
                ]
                t = matrix[positions[0][0]][positions[0][1]]
                for k in range(1, len(positions)):
                    temp = matrix[positions[k][0]][positions[k][1]]
                    matrix[positions[k][0]][positions[k][1]] = t
                    t = temp
                matrix[positions[0][0]][positions[0][1]] = t