text: from functools import reduce
  # Time:  O(m * n)
  # Space: O(1)
  
  class Solution(object):
      # @param matrix, a list of lists of integers
      # RETURN NOTHING, MODIFY matrix IN PLACE.
      def setZeroes(self, matrix):
          first_col = reduce(lambda acc, i: acc or matrix[i][0] == 0, range(len(matrix)), False)
          first_row = reduce(lambda acc, j: acc or matrix[0][j] == 0, range(len(matrix[0])), False)
  
          for i in range(1, len(matrix)):
              for j in range(1, len(matrix[0])):
                  if matrix[i][j] == 0:
                      matrix[i][0], matrix[0][j] = 0, 0
  
          for i in range(1, len(matrix)):
              for j in range(1, len(matrix[0])):
                  if matrix[i][0] == 0 or matrix[0][j] == 0:
                      matrix[i][j] = 0
  
          if first_col:
              for i in range(len(matrix)):
                  matrix[i][0] = 0
  
          if first_row:
              for j in range(len(matrix[0])):
                  matrix[0][j] = 0
  
  