From 793f2fc69b807cac2d010275fc88fcefb83a844a Mon Sep 17 00:00:00 2001
From: Ravi Maurya <39462517+raviMaurya12@users.noreply.github.com>
Date: Fri, 2 Oct 2020 13:43:24 +0530
Subject: [PATCH] added word break solution

---
 LeetCode/word_break.cpp | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 LeetCode/word_break.cpp

diff --git a/LeetCode/word_break.cpp b/LeetCode/word_break.cpp
new file mode 100644
index 0000000..84a0117
--- /dev/null
+++ b/LeetCode/word_break.cpp
@@ -0,0 +1,28 @@
+// Word break memoization solution
+
+class Solution {
+public:
+    unordered_map<string,int> mpp;
+    int dp[501];
+    
+    bool get(string s,int index){
+        if(index==s.size())return true;
+        if(dp[index]!=-1)return dp[index];
+        string tmp="";
+        bool ok=false;
+        for(int i=index;i<s.size();i++){
+            tmp+=s[i];
+            if(mpp[tmp]>0){
+                ok=(ok|get(s,i+1));
+            }
+        }
+        return dp[index]=ok;
+    }
+    
+    bool wordBreak(string s, vector<string>& wordDict) {
+        for(auto el:wordDict)mpp[el]++;
+        for(int i=0;i<501;i++)dp[i]=-1;
+        bool ans=get(s,0);
+        return ans;
+    }
+};
\ No newline at end of file