Created
June 17, 2016 22:02
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#!/usr/bin/env python3 | |
import unittest | |
from functools import reduce | |
from string import digits | |
def adjacent_digits_product(numb_str, digits_count): | |
numb_str = [i for i in numb_str if i in digits] | |
groups = [numb_str[i:i+digits_count] | |
for i in range(len(numb_str) - digits_count + 1)] | |
products = [reduce(lambda x, y: int(x) * int(y), g) for g in groups] | |
return max(products) | |
NUMB = """ | |
73167176531330624919225119674426574742355349194934 | |
96983520312774506326239578318016984801869478851843 | |
85861560789112949495459501737958331952853208805511 | |
12540698747158523863050715693290963295227443043557 | |
66896648950445244523161731856403098711121722383113 | |
62229893423380308135336276614282806444486645238749 | |
30358907296290491560440772390713810515859307960866 | |
70172427121883998797908792274921901699720888093776 | |
65727333001053367881220235421809751254540594752243 | |
52584907711670556013604839586446706324415722155397 | |
53697817977846174064955149290862569321978468622482 | |
83972241375657056057490261407972968652414535100474 | |
82166370484403199890008895243450658541227588666881 | |
16427171479924442928230863465674813919123162824586 | |
17866458359124566529476545682848912883142607690042 | |
24219022671055626321111109370544217506941658960408 | |
07198403850962455444362981230987879927244284909188 | |
84580156166097919133875499200524063689912560717606 | |
05886116467109405077541002256983155200055935729725 | |
71636269561882670428252483600823257530420752963450 | |
""" | |
class AdjacentProductTestCase(unittest.TestCase): | |
def test_4_digits(self): | |
self.assertEqual(adjacent_digits_product(NUMB, 4), 5832) | |
def test_5_digits(self): | |
self.assertEqual(adjacent_digits_product(NUMB, 5), 40824) | |
def test_13_digits(self): | |
self.assertEqual(adjacent_digits_product(NUMB, 13), 23514624000) | |
if __name__ == '__main__': | |
unittest.main() |
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