word-break

Author: chjung99

word-break/chjung99.java

@@ -0,0 +1,19 @@
+class Solution {
+    public boolean wordBreak(String s, List<String> wordDict) {
+        Set<String> wordSet = new HashSet<>(wordDict);
+        int n = s.length();
+        boolean[] dp = new boolean[n];
+        for (int i = 0; i < n; i++) {
+            dp[i] = wordSet.contains(s.substring(0, i+1));
+            for (int j = 0; j < i; j++) {
+                if (dp[j] && wordSet.contains(s.substring(j+1, i+1))){
+                    dp[i] = true;
+                }
+            }
+        }
+
+        return dp[n-1];
+    }
+}
+
+