Word Break

Author: TonyKim9401

word-break/TonyKim9401.java

@@ -0,0 +1,22 @@
+// TC: O(n^2)
+// -> use 2 for-loops to search
+// SC: O(n)
+// -> boolean array's size
+class Solution {
+    public boolean wordBreak(String s, List<String> wordDict) {
+        Set<String> set = new HashSet(wordDict);
+
+        boolean[] dp = new boolean[s.length() + 1];
+        dp[0] = true;
+
+        for (int i = 1; i <= s.length(); i++) {
+            for (int j = 0; j < i; j++) {
+                if (dp[j] && set.contains(s.substring(j, i))) {
+                    dp[i] = true;
+                    break;
+                }
+            }
+        }
+        return dp[s.length()];
+    }
+}