Create Word_Break.cc

Author: iphkwan

Word_Break.cc

@@ -0,0 +1,18 @@
+class Solution {
+public:
+    bool wordBreak(string s, unordered_set<string> &dict) {
+        // Note: The Solution object is instantiated only once and is reused by each test case.
+        if (s == "")
+            return true;
+        vector<bool> dp(s.length() + 1, false);
+        dp[0] = true;
+        for (int i = 0; i < s.length(); i++) {
+            if (dp[i] == false)
+                continue;
+            for (int j = 1; i + j <= s.length(); j++)
+                if (dict.find(s.substr(i, j)) != dict.end())
+                    dp[i + j] = true;
+        }
+        return dp[s.length()];
+    }
+};