恢复空格，未识别的最少字符数

yllg · yllg · commit 37c39ffb1822 · 2020-07-09T22:03:17.000+08:00
diff --git a/！补充题27.恢复空格，返回未识别的最少字符数/恢复空格，未识别的最少字符数.html b/！补充题27.恢复空格，返回未识别的最少字符数/恢复空格，未识别的最少字符数.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Document</title>
+  </head>
+  <body>
+    <script>
+      const respace = (dictionary, sentence) => {
+        const len = sentence.length;
+        const dp = new Array(len + 1);
+        dp[0] = 0;
+        for (let i = 1; i <= len; i++) {
+          dp[i] = dp[i - 1] + 1;
+          for (const word of dictionary) {
+            // 遍历字典里的单词
+            if (sentence.substring(i - word.length, i) == word) {
+              // 截取字典词的长度与字典词比较
+              dp[i] = Math.min(dp[i], dp[i - word.length]);
+            }
+          }
+        }
+        return dp[len];
+      };
+      // test
+      var dictionary = ["looked","just","like","her","brother"];
+      var sentence = "jesslookedjustliketimherbrother";
+      console.log(respace(dictionary, sentence));
+    </script>
+  </body>
+</html>
