1886.py

"""1886. Determine Whether Matrix Can Be Obtained By Rotation

Given two n x n binary matrices mat and target, return true if it is possible to make mat equal to target by rotating mat in 90-degree increments, or false otherwise.


Example 1:
Input: mat = [[0,1],[1,0]], target = [[1,0],[0,1]]
Output: true
Explanation: We can rotate mat 90 degrees clockwise to make mat equal target.


Example 2:
Input: mat = [[0,1],[1,1]], target = [[1,0],[0,1]]
Output: false
Explanation: It is impossible to make mat equal to target by rotating mat.


Example 3:
Input: mat = [[0,0,0],[0,1,0],[1,1,1]], target = [[1,1,1],[0,1,0],[0,0,0]]
Output: true
Explanation: We can rotate mat 90 degrees clockwise two times to make mat equal target."""


from typing import List

class Solution:
    def findRotation(self, mat: List[List[int]], target: List[List[int]]) -> bool:
        for _ in range(4):
            if mat == target:
                return True
            # rotate 90° clockwise
            mat = [list(row) for row in zip(*mat[::-1])]
        return False


# Test locally
if __name__ == "__main__":
    sol = Solution()
    
    tests = [
        ([[0,1],[1,0]], [[1,0],[0,1]], True),
        ([[0,1],[1,1]], [[1,0],[0,1]], False),
        ([[0,0,0],[0,1,0],[1,1,1]], [[1,1,1],[0,1,0],[0,0,0]], True),
    ]
    
    for i, (mat, target, expected) in enumerate(tests, 1):
        result = sol.findRotation(mat, target)
        print(f"Test {i}: {result} (Expected: {expected})")