面试题 17.13:恢复空格

src/main/java/leetcode/editor/cn/ReSpaceLcci.java

@@ -0,0 +1,57 @@
+//<p>哦，不！你不小心把一个长篇文章中的空格、标点都删掉了，并且大写也弄成了小写。像句子<code>&quot;I reset the computer. It still didn&rsquo;t boot!&quot;</code>已经变成了<code>&quot;iresetthecomputeritstilldidntboot&quot;</code>。在处理标点符号和大小写之前，你得先把它断成词语。当然了，你有一本厚厚的词典<code>dictionary</code>，不过，有些词没在词典里。假设文章用<code>sentence</code>表示，设计一个算法，把文章断开，要求未识别的字符最少，返回未识别的字符数。</p>
+//
+//<p><strong>注意：</strong>本题相对原题稍作改动，只需返回未识别的字符数</p>
+//
+//<p>&nbsp;</p>
+//
+//<p><strong>示例：</strong></p>
+//
+//<pre><strong>输入：</strong>
+//dictionary = [&quot;looked&quot;,&quot;just&quot;,&quot;like&quot;,&quot;her&quot;,&quot;brother&quot;]
+//sentence = &quot;jesslookedjustliketimherbrother&quot;
+//<strong>输出：</strong> 7
+//<strong>解释：</strong> 断句后为&quot;<strong>jess</strong> looked just like <strong>tim</strong> her brother&quot;，共7个未识别字符。
+//</pre>
+//
+//<p><strong>提示：</strong></p>
+//
+//<ul>
+//	<li><code>0 &lt;= len(sentence) &lt;= 1000</code></li>
+//	<li><code>dictionary</code>中总字符数不超过 150000。</li>
+//	<li>你可以认为<code>dictionary</code>和<code>sentence</code>中只包含小写字母。</li>
+//</ul>
+//<div><div>Related Topics</div><div><li>字典树</li><li>数组</li><li>哈希表</li><li>字符串</li><li>动态规划</li><li>哈希函数</li><li>滚动哈希</li></div></div><br><div><li>👍 198</li><li>👎 0</li></div>
+package leetcode.editor.cn;
+
+import java.util.*;
+
+// 面试题 17.13:恢复空格
+public class ReSpaceLcci {
+    public static void main(String[] args) {
+        Solution solution = new ReSpaceLcci().new Solution();
+        // TO TEST
+    }
+
+    //leetcode submit region begin(Prohibit modification and deletion)
+    class Solution {
+        public int respace(String[] dictionary, String sentence) {
+            int n = sentence.length();
+            int m = dictionary.length;
+            int[] dp = new int[n + 1];
+            for (int i = 1; i <= n; i++) {
+                dp[i] = dp[i - 1];
+                for (String s : dictionary) {
+                    if (i < s.length()) {
+                        continue;
+                    }
+                    if (sentence.startsWith(s, i - s.length())) {
+                        dp[i] = Math.max(dp[i - s.length()] + s.length(), dp[i]);
+                    }
+                }
+            }
+            return n - dp[n];
+        }
+    }
+//leetcode submit region end(Prohibit modification and deletion)
+
+}

src/main/java/leetcode/editor/cn/doc/content/ReSpaceLcci.md

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+<p>哦，不！你不小心把一个长篇文章中的空格、标点都删掉了，并且大写也弄成了小写。像句子<code>&quot;I reset the computer. It still didn&rsquo;t boot!&quot;</code>已经变成了<code>&quot;iresetthecomputeritstilldidntboot&quot;</code>。在处理标点符号和大小写之前，你得先把它断成词语。当然了，你有一本厚厚的词典<code>dictionary</code>，不过，有些词没在词典里。假设文章用<code>sentence</code>表示，设计一个算法，把文章断开，要求未识别的字符最少，返回未识别的字符数。</p>
+
+<p><strong>注意：</strong>本题相对原题稍作改动，只需返回未识别的字符数</p>
+
+<p>&nbsp;</p>
+
+<p><strong>示例：</strong></p>
+
+<pre><strong>输入：</strong>
+dictionary = [&quot;looked&quot;,&quot;just&quot;,&quot;like&quot;,&quot;her&quot;,&quot;brother&quot;]
+sentence = &quot;jesslookedjustliketimherbrother&quot;
+<strong>输出：</strong> 7
+<strong>解释：</strong> 断句后为&quot;<strong>jess</strong> looked just like <strong>tim</strong> her brother&quot;，共7个未识别字符。
+</pre>
+
+<p><strong>提示：</strong></p>
+
+<ul>
+	<li><code>0 &lt;= len(sentence) &lt;= 1000</code></li>
+	<li><code>dictionary</code>中总字符数不超过 150000。</li>
+	<li>你可以认为<code>dictionary</code>和<code>sentence</code>中只包含小写字母。</li>
+</ul>
+<div><div>Related Topics</div><div><li>字典树</li><li>数组</li><li>哈希表</li><li>字符串</li><li>动态规划</li><li>哈希函数</li><li>滚动哈希</li></div></div><br><div><li>👍 198</li><li>👎 0</li></div>