def problem8(filename):
""" Return the greatest product of five consecutive digits in given
file which contains the 1000-digit number.
>>> problem8('problem08.txt')
40824
"""
lines, n = open(filename).readlines(), 5
matrix = [map(lib.convert_int, list(line.strip())) for line in lines]
return lib.greatest_product_row(matrix, n)
def problem11(filename):
"""
>>> problem11('problem11.txt')
70600674
"""
n = 4
lines = open(filename).readlines()
matrix = [map(lib.convert_int, line.strip().split(' '))
for line in lines]
d1, d2 = lib.greatest_product_diagonally(matrix, n)
L = [lib.greatest_product_row(matrix, n),
lib.greatest_product_col(matrix, n), d1, d2]
L.sort()
return L[-1]
