def euler():
xs = flattened_list_from_file("data/059.txt", separator = ",")
letter_range = range(ord('a'), ord('z') + 1)
common_chars_rx = re.compile("[ a-zA-Z.,']")
the_rx = re.compile("\\bthe\\b")
for a in letter_range:
for b in letter_range:
for c in letter_range:
key = [a, b, c]
decrypted = "".join(chr(x ^ key[i % len(key)]) for i,x in enumerate(xs))
chars = len(decrypted)
common_chars = len(common_chars_rx.findall(decrypted))
thes = len(the_rx.findall(decrypted))
if common_chars >= 0.95 * chars and thes >= 3:
return sum(ord(c) for c in decrypted)
return None
def euler():
# read the names from the file
names = fileutils.flattened_list_from_file('data/022.txt', separator = ',',
convert_to = str)
# remove the quotes surrounding the name
names = [name.replace('"', '') for name in names]
# sort the names alphabetically
names.sort()
# accumulator for the total of the name scores
accumulator = 0
for index, name in enumerate(names):
# calculate the name score
score = sum(ord(letter) - ord('A') + 1 for letter in name)
score *= (index + 1)
# add the score to the accumulator
accumulator += score
# return the accumulator
return accumulator
def euler():
# set of the triangle numbers until an arbitrary maximum number
triangles = set()
# generate triangle numbers
n = 1
highest_triangle = 0
while highest_triangle < MAX:
highest_triangle = n * (n + 1) // 2
triangles.add(highest_triangle)
n += 1
# read the words and put them into a list of strings
words = fileutils.flattened_list_from_file('data/042.txt',
separator = ',', convert_to = str)
# strip the quote-sign from the strings, leaving only the word
words = [word.replace('"', '') for word in words]
# accumulator for the final answer, the number of triangle words
triangle_word_count = 0
# count the number of triangle words
for word in words:
if word_to_int(word) in triangles:
triangle_word_count += 1
# return it
return triangle_word_count
def euler():
# read the file
numbers = fileutils.flattened_list_from_file('data/013.txt')
# return the first ten digits of the sum of the numbers
return str(sum(numbers)) [:10]
