feat: week3 medium 문제풀이(combination-sum)

Author: jinah92

combination-sum/jinah92.py

@@ -0,0 +1,19 @@
+# O(T) time, O(C^T) space
+class Solution:
+    def combinationSum(self, candidates: List[int], target: int) -> List[List[int]]:
+        results, nums = [], []
+
+        def dfs(start, total):
+            if total > target:
+                return
+            if total == target:
+                results.append(nums[:])
+            for i in range(start, len(candidates)):
+                num = candidates[i]
+                nums.append(num)
+                dfs(i, total + num)
+                nums.pop()
+        
+        dfs(0, 0)
+
+        return results