1 files changed, 13 insertions, 0 deletions
diff --git a/challenge-208/eric-cheung/python/ch-2.py b/challenge-208/eric-cheung/python/ch-2.py
new file mode 100755
index 0000000000..951f8a03a0
--- /dev/null
+++ b/challenge-208/eric-cheung/python/ch-2.py
@@ -0,0 +1,13 @@
+
+## arrNum = [1, 2, 2, 4]  ## Example 1
+## arrNum = [1, 2, 3, 4]  ## Example 2
+arrNum = [1, 2, 3, 3]  ## Example 3
+
+arrList = range(1, len(arrNum) + 1)
+
+arrDupMiss = list(set([nElemLoop for nElemLoop in arrNum if arrNum.count(nElemLoop) > 1])) + list(set(arrList).difference(set(arrNum)))
+
+if len(arrDupMiss) > 0:
+    print (arrDupMiss)
+else:
+    print (-1)