diff --git a/Combination Sum - Leetcode 39/Combination Sum - Leetcode 39.py b/Combination Sum - Leetcode 39/Combination Sum - Leetcode 39.py
index e69de29..2a1ac85 100644
--- a/Combination Sum - Leetcode 39/Combination Sum - Leetcode 39.py	
+++ b/Combination Sum - Leetcode 39/Combination Sum - Leetcode 39.py	
@@ -0,0 +1,24 @@
+class Solution:
+    def combinationSum(self, candidates: List[int], target: int) -> List[List[int]]:
+        res = []
+        sol = []
+
+        def backtrack(i, cur_sum):
+            if cur_sum == target:
+                res.append(sol.copy())
+                return
+            
+            if cur_sum > target or i == len(candidates):
+                return
+
+            backtrack(i + 1, cur_sum)
+
+            sol.append(candidates[i])
+            backtrack(i, cur_sum + candidates[i])
+            sol.pop()
+
+        backtrack(0, 0)
+        return res
+
+# Time Complexity: O(2^target)
+# Space Complexity: O(target)
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