Solve : Combination Sum

Author: printjin-gmailcom

combination-sum/printjin-gmailcom.py

@@ -0,0 +1,15 @@
+class Solution:
+    def combinationSum(self, candidates, target):
+        output, nums = [], []
+        def dfs(start, total):
+            if total > target:
+                return
+            if total == target:
+                return output.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 output