139. Word Break

word-break/gwbaik9717.js

@@ -0,0 +1,25 @@
+// n: len(s), m: len(wordDict)
+// Time complexity: O(n^2*m)
+// Space complexity: O(n)
+
+/**
+ * @param {string} s
+ * @param {string[]} wordDict
+ * @return {boolean}
+ */
+var wordBreak = function (s, wordDict) {
+  const dp = Array.from({ length: s.length + 1 }, () => false);
+  dp[0] = true;
+
+  for (let i = 1; i <= s.length; i++) {
+    for (const word of wordDict) {
+      const sliced = s.slice(i - word.length, i);
+
+      if (word === sliced && !dp[i]) {
+        dp[i] = dp[i - word.length];
+      }
+    }
+  }
+
+  return dp.at(-1);
+};