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#!/usr/bin/env python
# -*- coding: utf-8 -*-
def max_submatrix(matrix):
max_area = 0
max_i = max_j = max_width = max_height = 0
for i, row in enumerate(matrix):
for j, cell in enumerate(row):
if cell != 0:
continue
width = 1
height = 1
while i + height < len(matrix) and matrix[i + height][j] == 0:
height += 1
while j + width < len(row) and all_zeros(matrix, i, j, height, width):
width += 1
area = width * height
if area > max_area:
max_area = area
max_i, max_j, max_width, max_height = i, j, width, height
return [
row[max_j : max_j + max_width] for row in matrix[max_i : max_i + max_height]
]
def all_zeros(matrix, i, j, height, width):
return all(matrix[k][j + width] == 0 for k in range(i, i + height))
matrix = [
[1, 0, 0, 0, 1, 0],
[1, 1, 0, 0, 0, 1],
[1, 0, 0, 0, 0, 0],
]
result = max_submatrix(matrix)
for row in result:
print(" ".join(str(x) for x in row))
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