840-Magic-Squares-In-Grid
Sat 17 May 2025
https://leetcode.com/problems/magic-squares-in-grid
import pyutil as pyu
pyu.get_local_pyinfo()
print(pyu.ps2("python-dotenv"))
from typing import List
class Solution:
def numMagicSquaresInside(self, grid: List[List[int]]) -> int:
def isMagic(i: int, j: int) -> int:
s = "".join(str(grid[i + num // 3][j + num % 3])
for num in [0, 1, 2, 5, 8, 7, 6, 3])
return s in "43816729" * 2 or s in "43816729"[::-1] * 2
ans = 0
for i in range(len(grid) - 2):
for j in range(len(grid[0]) - 2):
if grid[i][j] % 2 == 0 and grid[i + 1][j + 1] == 5:
ans += isMagic(i, j)
return ans
new Solution().numMagicSquaresInside()
Score: 5
Category: leetcode