sgreen solutions to challenge 142

1 files changed, 40 insertions, 0 deletions

diff --git a/challenge-142/sgreen/python/ch-1.py b/challenge-142/sgreen/python/ch-1.py
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+#!/usr/bin/env python
+
+import sys
+
+
+def _get_divisors(number):
+    # Every number is divisible by 1
+    divisors = [1]
+
+    # One only has one divisor
+    if number == 1:
+        return divisors
+
+    # Find other divisors
+    for i in range(2, int(number / 2) + 1):
+        if number % i == 0:
+            divisors.append(i)
+
+    # ... including the number itself
+    divisors.append(number)
+
+    return divisors
+
+
+def main(inputs):
+    m = int(inputs[0])
+    n = int(inputs[1])
+
+    if m < 1:
+        raise ValueError('The first number must be a positive integer')
+    if n < 1 or n > 9:
+        raise ValueError('The second number must be between 1 and 9')
+
+    # Get a list of divisors and find those that end with n.
+    solution = [x for x in _get_divisors(m) if x % 10 == n]
+    print(len(solution))
+
+
+if __name__ == '__main__':
+    main(sys.argv[1:])