Create word_breaks_2.cpp

Author: vishnuthumpudi

word_breaks_2.cpp

@@ -0,0 +1,31 @@
+class Solution {
+public:
+    vector<string> solve(string s, unordered_map<string, bool> &words, int i){
+        if(i >= s.size()) return {""};
+
+        string word;
+        vector<string> ans;
+
+        for(int j = i; j<s.size(); j++){
+            word += s[j];
+            if(words.find(word) == words.end()) continue;
+            //word found
+            auto rightPart = solve(s, words, j+1);
+            for(auto part: rightPart){
+                string end;
+                if(part.size() > 0) end += " " + part;
+                ans.push_back(word + end);
+            }
+            
+        }
+        return ans;
+    }
+
+    vector<string> wordBreak(string s, vector<string>& wordDict) {
+        unordered_map<string, bool> words;
+        for(auto i : wordDict){
+            words[i] = 1;
+        }
+        return solve(s, words, 0);
+    }
+};