From 39a387fda0327a93d52672621fe7758742fac408 Mon Sep 17 00:00:00 2001 From: Roger Bell_West Date: Mon, 16 Aug 2021 13:18:14 +0100 Subject: Solutions for challenge #126 --- challenge-126/roger-bell-west/python/ch-1.py | 36 ++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100755 challenge-126/roger-bell-west/python/ch-1.py (limited to 'challenge-126/roger-bell-west/python/ch-1.py') diff --git a/challenge-126/roger-bell-west/python/ch-1.py b/challenge-126/roger-bell-west/python/ch-1.py new file mode 100755 index 0000000000..d50faf6626 --- /dev/null +++ b/challenge-126/roger-bell-west/python/ch-1.py @@ -0,0 +1,36 @@ +#! /usr/bin/python3 + +import unittest + +def cn(n): + k=n + digits=[] + while k>0: + d=k % 10 + if d==1: + digits=[8] * len(digits) + if d>0: + d -= 1 + digits.append(d) + k=int(k/10) + tc=0 + for i in range(len(digits)-1,-1,-1): + tc *= 9 + tc += digits[i] + return tc + +class TestCn(unittest.TestCase): + + def test_ex1(self): + self.assertEqual(cn(15),8,'example 1') + + def test_ex2(self): + self.assertEqual(cn(25),13,'example 2') + + def test_ex3(self): + self.assertEqual(cn(10000),6560,'example 3') + + def test_ex4(self): + self.assertEqual(cn(100000000),43046720,'example 3') + +unittest.main() -- cgit