diff --git a/contains-duplicate/codyman0.py b/contains-duplicate/codyman0.py
new file mode 100644
index 000000000..1cc2b3e02
--- /dev/null
+++ b/contains-duplicate/codyman0.py
@@ -0,0 +1,16 @@
+"""
+https://leetcode.com/problems/contains-duplicate/
+"""
+
+# Time complexity : O(n)
+
+
+class Solution:
+    def containsDuplicate(self, nums: List[int]) -> bool:
+        sortedArray = sorted(nums)
+        for i in range(len(sortedArray)): 
+            if i == len(sortedArray) - 1: 
+                return False
+            if sortedArray[i] == sortedArray[i + 1] :
+                return True
+        return False