Merge pull request #7751 from simongreen-net/master

Simon's solution to challenge 208

1 files changed, 27 insertions, 0 deletions

diff --git a/challenge-208/sgreen/python/ch-2.py b/challenge-208/sgreen/python/ch-2.py
new file mode 100755
index 0000000000..84952f60f1
--- /dev/null
+++ b/challenge-208/sgreen/python/ch-2.py
@@ -0,0 +1,27 @@
+#!/usr/bin/env python3
+
+import sys
+
+
+def main(array):
+    missing = None
+    duplicate = None
+
+    for i in range(1, len(array)+1):
+        # Find out how many times this number appears in the list
+        count = sum(1 for n in array if n == i)
+        if count == 0:
+            missing = i
+        elif count > 1:
+            duplicate = i
+
+    if missing is None:
+        print(-1)
+    else:
+        print(f'({duplicate or ""}, {missing})')
+
+
+if __name__ == '__main__':
+    # Turn the strings into integers
+    n = [int(i) for i in sys.argv[1:]]
+    main(n)