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#!/usr/bin/env python3
# Challenge 068
#
# TASK #1 > Zero Matrix
# Submitted by: Mohammad S Anwar
# You are given a matrix of size M x N having only 0s and 1s.
#
# Write a script to set the entire row and column to 0 if an element is 0.
#
# Example 1
# Input: [1, 0, 1]
# [1, 1, 1]
# [1, 1, 1]
#
# Output: [0, 0, 0]
# [1, 0, 1]
# [1, 0, 1]
# Example 2
# Input: [1, 0, 1]
# [1, 1, 1]
# [1, 0, 1]
#
# Output: [0, 0, 0]
# [1, 0, 1]
# [0, 0, 0]
from copy import deepcopy
import unittest
def zero_matrix(m):
orig = deepcopy(m)
for r in range(len(m)):
for c in range(len(m[0])):
if not orig[r][c]:
m = zero_row(r, m)
m = zero_col(c, m)
return m
def zero_row(r, m):
for c in range(len(m[0])):
m[r][c] = 0
return m
def zero_col(c, m):
for r in range(len(m)):
m[r][c] = 0
return m
class TestZeroMatrix(unittest.TestCase):
def test_zero_matrix(self):
self.assertEqual(zero_matrix([[1, 0, 1], [1, 1, 1], [1, 1, 1]]), [[0, 0, 0], [1, 0, 1], [1, 0, 1]])
self.assertEqual(zero_matrix([[1, 0, 1], [1, 1, 1], [1, 0, 1]]), [[0, 0, 0], [1, 0, 1], [0, 0, 0]])
if __name__ == '__main__':
unittest.main()
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