adding dfs

Author: ivanpenaloza

src/my_project/interviews/top_amazon_questions_round_1/word_break_ii.py

@@ -0,0 +1,22 @@
+from typing import List, Union
+
+class Solution:
+    def wordBreak(self, s: str, wordDict: List[str]) -> List[str]:
+        res = []
+        wordSet = set(wordDict)
+
+        def helper(i, cur, path):
+            if i == len(s):
+                if not cur:
+                    res.append(' '.join(path))
+                return
+            
+            cur += s[i]  # include current character
+            
+            if cur in wordSet:
+                helper(i + 1, '', path + [cur])  # cut here
+
+            helper(i + 1, cur, path)  # continue building cur
+
+        helper(0, '', [])
+        return res