1 files changed, 39 insertions, 0 deletions
diff --git a/challenge-320/sgreen/python/ch-2.py b/challenge-320/sgreen/python/ch-2.py
new file mode 100755
index 0000000000..cda60d3d8d
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+++ b/challenge-320/sgreen/python/ch-2.py
@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+
+import sys
+
+
+def sum_difference(ints: list) -> int:
+    """Calculate the absolute difference between digit sum and element
+    sum of the given list.
+
+    Args:
+        ints (list): A list of positive integers
+
+    Returns:
+        int: The absolute difference.
+    """
+    # Check we are only given positive integers
+    if any(i < 1 for i in ints):
+        raise ValueError('Only positive integers allowed')
+
+    difference = 0
+    for i in ints:
+        # Single digit integers have no difference
+        if i > 9:
+            # Calculate the difference between the number and the sum of the
+            #  individual digits
+            difference += i - sum(int(d) for d in str(i))
+
+    return abs(difference)
+
+
+def main():
+    # Convert input into integers
+    array = [int(n) for n in sys.argv[1:]]
+    result = sum_difference(array)
+    print(result)
+
+
+if __name__ == '__main__':
+    main()