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{
"data": {
"question": {
"questionId": "1397",
"questionFrontendId": "1268",
"categoryTitle": "Algorithms",
"boundTopicId": 45587,
"title": "Search Suggestions System",
"titleSlug": "search-suggestions-system",
"content": "<p>You are given an array of strings <code>products</code> and a string <code>searchWord</code>.</p>\n\n<p>Design a system that suggests at most three product names from <code>products</code> after each character of <code>searchWord</code> is typed. Suggested products should have common prefix with <code>searchWord</code>. If there are more than three products with a common prefix return the three lexicographically minimums products.</p>\n\n<p>Return <em>a list of lists of the suggested products after each character of </em><code>searchWord</code><em> is typed</em>.</p>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> products = [&quot;mobile&quot;,&quot;mouse&quot;,&quot;moneypot&quot;,&quot;monitor&quot;,&quot;mousepad&quot;], searchWord = &quot;mouse&quot;\n<strong>Output:</strong> [\n[&quot;mobile&quot;,&quot;moneypot&quot;,&quot;monitor&quot;],\n[&quot;mobile&quot;,&quot;moneypot&quot;,&quot;monitor&quot;],\n[&quot;mouse&quot;,&quot;mousepad&quot;],\n[&quot;mouse&quot;,&quot;mousepad&quot;],\n[&quot;mouse&quot;,&quot;mousepad&quot;]\n]\n<strong>Explanation:</strong> products sorted lexicographically = [&quot;mobile&quot;,&quot;moneypot&quot;,&quot;monitor&quot;,&quot;mouse&quot;,&quot;mousepad&quot;]\nAfter typing m and mo all products match and we show user [&quot;mobile&quot;,&quot;moneypot&quot;,&quot;monitor&quot;]\nAfter typing mou, mous and mouse the system suggests [&quot;mouse&quot;,&quot;mousepad&quot;]\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> products = [&quot;havana&quot;], searchWord = &quot;havana&quot;\n<strong>Output:</strong> [[&quot;havana&quot;],[&quot;havana&quot;],[&quot;havana&quot;],[&quot;havana&quot;],[&quot;havana&quot;],[&quot;havana&quot;]]\n</pre>\n\n<p><strong>Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> products = [&quot;bags&quot;,&quot;baggage&quot;,&quot;banner&quot;,&quot;box&quot;,&quot;cloths&quot;], searchWord = &quot;bags&quot;\n<strong>Output:</strong> [[&quot;baggage&quot;,&quot;bags&quot;,&quot;banner&quot;],[&quot;baggage&quot;,&quot;bags&quot;,&quot;banner&quot;],[&quot;baggage&quot;,&quot;bags&quot;],[&quot;bags&quot;]]\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= products.length &lt;= 1000</code></li>\n\t<li><code>1 &lt;= products[i].length &lt;= 3000</code></li>\n\t<li><code>1 &lt;= sum(products[i].length) &lt;= 2 * 10<sup>4</sup></code></li>\n\t<li>All the strings of <code>products</code> are <strong>unique</strong>.</li>\n\t<li><code>products[i]</code> consists of lowercase English letters.</li>\n\t<li><code>1 &lt;= searchWord.length &lt;= 1000</code></li>\n\t<li><code>searchWord</code> consists of lowercase English letters.</li>\n</ul>\n",
"translatedTitle": "搜索推荐系统",
"translatedContent": "<p>给你一个产品数组&nbsp;<code>products</code>&nbsp;和一个字符串&nbsp;<code>searchWord</code>&nbsp;<code>products</code>&nbsp; 数组中每个产品都是一个字符串。</p>\n\n<p>请你设计一个推荐系统,在依次输入单词&nbsp;<code>searchWord</code> 的每一个字母后,推荐&nbsp;<code>products</code> 数组中前缀与&nbsp;<code>searchWord</code> 相同的最多三个产品。如果前缀相同的可推荐产品超过三个,请按字典序返回最小的三个。</p>\n\n<p>请你以二维列表的形式,返回在输入&nbsp;<code>searchWord</code>&nbsp;每个字母后相应的推荐产品的列表。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1</strong></p>\n\n<pre><strong>输入:</strong>products = [&quot;mobile&quot;,&quot;mouse&quot;,&quot;moneypot&quot;,&quot;monitor&quot;,&quot;mousepad&quot;], searchWord = &quot;mouse&quot;\n<strong>输出:</strong>[\n[&quot;mobile&quot;,&quot;moneypot&quot;,&quot;monitor&quot;],\n[&quot;mobile&quot;,&quot;moneypot&quot;,&quot;monitor&quot;],\n[&quot;mouse&quot;,&quot;mousepad&quot;],\n[&quot;mouse&quot;,&quot;mousepad&quot;],\n[&quot;mouse&quot;,&quot;mousepad&quot;]\n]\n<strong>解释:</strong>按字典序排序后的产品列表是 [&quot;mobile&quot;,&quot;moneypot&quot;,&quot;monitor&quot;,&quot;mouse&quot;,&quot;mousepad&quot;]\n输入 m 和 mo由于所有产品的前缀都相同所以系统返回字典序最小的三个产品 [&quot;mobile&quot;,&quot;moneypot&quot;,&quot;monitor&quot;]\n输入 mou mous 和 mouse 后系统都返回 [&quot;mouse&quot;,&quot;mousepad&quot;]\n</pre>\n\n<p><strong>示例 2</strong></p>\n\n<pre><strong>输入:</strong>products = [&quot;havana&quot;], searchWord = &quot;havana&quot;\n<strong>输出:</strong>[[&quot;havana&quot;],[&quot;havana&quot;],[&quot;havana&quot;],[&quot;havana&quot;],[&quot;havana&quot;],[&quot;havana&quot;]]\n</pre>\n\n<p><strong>示例 3</strong></p>\n\n<pre><strong>输入:</strong>products = [&quot;bags&quot;,&quot;baggage&quot;,&quot;banner&quot;,&quot;box&quot;,&quot;cloths&quot;], searchWord = &quot;bags&quot;\n<strong>输出:</strong>[[&quot;baggage&quot;,&quot;bags&quot;,&quot;banner&quot;],[&quot;baggage&quot;,&quot;bags&quot;,&quot;banner&quot;],[&quot;baggage&quot;,&quot;bags&quot;],[&quot;bags&quot;]]\n</pre>\n\n<p><strong>示例 4</strong></p>\n\n<pre><strong>输入:</strong>products = [&quot;havana&quot;], searchWord = &quot;tatiana&quot;\n<strong>输出:</strong>[[],[],[],[],[],[],[]]\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= products.length &lt;= 1000</code></li>\n\t<li><code>1 &lt;= &Sigma; products[i].length &lt;= 2 * 10^4</code></li>\n\t<li><code>products[i]</code>&nbsp;中所有的字符都是小写英文字母。</li>\n\t<li><code>1 &lt;= searchWord.length &lt;= 1000</code></li>\n\t<li><code>searchWord</code>&nbsp;中所有字符都是小写英文字母。</li>\n</ul>\n",
"isPaidOnly": false,
"difficulty": "Medium",
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"name": "Trie",
"slug": "trie",
"translatedName": "字典树",
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"translatedName": "数组",
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"code": "class Solution {\npublic:\n vector<vector<string>> suggestedProducts(vector<string>& products, string searchWord) {\n\n }\n};",
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"code": "class Solution(object):\n def suggestedProducts(self, products, searchWord):\n \"\"\"\n :type products: List[str]\n :type searchWord: str\n :rtype: List[List[str]]\n \"\"\"",
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"code": "public class Solution {\n public IList<IList<string>> SuggestedProducts(string[] products, string searchWord) {\n\n }\n}",
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"hints": [
"Brute force is a good choice because length of the string is ≤ 1000.",
"Binary search the answer.",
"Use Trie data structure to store the best three matching. Traverse the Trie."
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"sampleTestCase": "[\"mobile\",\"mouse\",\"moneypot\",\"monitor\",\"mousepad\"]\n\"mouse\"",
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