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# 2373. Largest Local Values in a Matrix
"""
given an 'n n' integer matrix grid. generate an integer matrix 'max_local'
of size '(n - 2) (n - 2)' such that 'max_local[i][j]' is equal to the
largest value of the 3 3 matrix in 'grid' centred around row 'i + 1' and
column 'j + 1'. in other words, we want to find the largest value in every
contiguous 3 3 matrix in 'grid'. return the generated matrix.
"""
class Solution(object):
def largestLocal(self, grid):
"""
:type grid: List[List[int]]
:rtype: List[List[int]]
"""
n = len(grid)
ans = [[0] * (n - 2) for _ in range(n - 2)]
for i in range(n - 2):
for j in range(n - 2):
ans[i][j] = max(
grid[ii][jj] for ii in range(i, i + 3) for jj in range(j, j + 3)
)
return ans
if __name__ == "__main__":
obj = Solution()
print(
obj.largestLocal(grid=[[9, 9, 8, 1], [5, 6, 2, 6], [8, 2, 6, 4], [6, 2, 2, 2]])
)
print(
obj.largestLocal(
grid=[
[1, 1, 1, 1, 1],
[1, 1, 1, 1, 1],
[1, 1, 2, 1, 1],
[1, 1, 1, 1, 1],
[1, 1, 1, 1, 1],
]
)
)
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