diff --git a/two-sum/hongseoupyun.py b/two-sum/hongseoupyun.py
new file mode 100644
index 000000000..ae73f7e3d
--- /dev/null
+++ b/two-sum/hongseoupyun.py
@@ -0,0 +1,10 @@
+class Solution:
+    def twoSum(self, nums: List[int], target: int) -> List[int]:
+        seen = {}
+        for i, num in enumerate(nums):
+            complement = target - num
+            if complement in seen:      
+                return [seen[complement], i]
+            seen[num] = i               
+        return []
+      
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