1 files changed, 37 insertions, 0 deletions
diff --git a/challenge-262/steven-wilson/python/ch-2.py b/challenge-262/steven-wilson/python/ch-2.py
new file mode 100755
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+++ b/challenge-262/steven-wilson/python/ch-2.py
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+#!/usr/bin/env python3
+
+
+def count_equal_divisible(*elements, divisor):
+    '''
+    Given an array of integers, @ints and an integer $k.  Return the number of
+    pairs (i, j) where:
+    a) 0 <= i < j < size of @ints
+    b) ints[i] == ints[j]
+    c) i x j is divisible by k
+    >>> count_equal_divisible(3,1,2,2,2,1,3, divisor = 2)
+    4
+    >>> count_equal_divisible(1,2,3, divisor = 1)
+    0
+    '''
+    if not isinstance(divisor, int):
+        raise TypeError("Divisor must be an integer")
+
+    if not all(isinstance(elem, int) for elem in elements):
+        raise TypeError("All elements must be integers")
+
+    count = 0
+    length_elements = len(elements)
+
+    for i, val_i in enumerate(elements):
+        for j in range(i + 1, length_elements):
+            val_j = elements[j]
+            if (val_i == val_j) and ((i * j) % divisor == 0):
+                count += 1
+
+    return count
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod()