{"id":10082,"date":"2023-08-26T09:29:43","date_gmt":"2023-08-26T16:29:43","guid":{"rendered":"https:\/\/zxi.mytechroad.com\/blog\/?p=10082"},"modified":"2023-08-26T09:30:20","modified_gmt":"2023-08-26T16:30:20","slug":"leetcode-2828-check-if-a-string-is-an-acronym-of-words","status":"publish","type":"post","link":"https:\/\/zxi.mytechroad.com\/blog\/string\/leetcode-2828-check-if-a-string-is-an-acronym-of-words\/","title":{"rendered":"\u82b1\u82b1\u9171 LeetCode 2828. Check if a String Is an Acronym of Words"},"content":{"rendered":"\n

Given an array of strings words<\/code> and a string s<\/code>, determine if s<\/code> is an acronym<\/strong> of words.<\/p>\n\n\n\n

The string s<\/code> is considered an acronym of words<\/code> if it can be formed by concatenating the first<\/strong> character of each string in words<\/code> in order<\/strong>. For example, \"ab\"<\/code> can be formed from [\"apple\", \"banana\"]<\/code>, but it can’t be formed from [\"bear\", \"aardvark\"]<\/code>.<\/p>\n\n\n\n

Return true<\/code> if <\/em>s<\/code> is an acronym of <\/em>words<\/code>, and <\/em>false<\/code> otherwise.<\/em><\/p>\n\n\n\n

Example 1:<\/strong><\/p>\n\n\n\n

Input:<\/strong> words = [\"alice\",\"bob\",\"charlie\"], s = \"abc\"\nOutput:<\/strong> true\nExplanation:<\/strong> The first character in the words \"alice\", \"bob\", and \"charlie\" are 'a', 'b', and 'c', respectively. Hence, s = \"abc\" is the acronym. \n<\/pre>\n\n\n\n
Example 2:<\/strong><\/p>\n\n\n\n
Input:<\/strong> words = [\"an\",\"apple\"], s = \"a\"\nOutput:<\/strong> false\nExplanation:<\/strong> The first character in the words \"an\" and \"apple\" are 'a' and 'a', respectively. \nThe acronym formed by concatenating these characters is \"aa\". \nHence, s = \"a\" is not the acronym.\n<\/pre>\n\n\n\n
Example 3:<\/strong><\/p>\n\n\n\n
Input:<\/strong> words = [\"never\",\"gonna\",\"give\",\"up\",\"on\",\"you\"], s = \"ngguoy\"\nOutput:<\/strong> true\nExplanation: <\/strong>By concatenating the first character of the words in the array, we get the string \"ngguoy\". \nHence, s = \"ngguoy\" is the acronym.\n<\/pre>\n\n\n\n
Constraints:<\/strong><\/p>\n\n\n\n
  • 1 <= words.length <= 100<\/code><\/li>
  • 1 <= words[i].length <= 10<\/code><\/li>
  • 1 <= s.length <= 100<\/code><\/li>
  • words[i]<\/code> and s<\/code> consist of lowercase English letters.
    <\/li><\/ul>\n\n\n\n
    Solution: Check the first letter of each word<\/strong><\/h2>\n\n\n\n
    No need to concatenate, just check the first letter of each word.<\/p>\n\n\n\n
    Time complexity: O(n)
    Space complexity: O(1)<\/p>\n\n\n\n
    \n
    C++<\/h2>\n
    \n\n
    \n\/\/ Author: Huahua\nclass Solution {\npublic:\n  bool isAcronym(vector& words, string_view s) {\n    if (words.size() != s.size()) return false;\n    for (int i = 0; i < s.size(); ++i)\n      if (words[i][0] != s[i]) return false;\n    return true;\n  }\n};\n<\/pre>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"
    Given an array of strings words and a string s, determine if s is an acronym of words. The string s is considered an acronym of words if it can be formed by concatenating the first character of…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[222,4],"class_list":["post-10082","post","type-post","status-publish","format-standard","hentry","category-string","tag-easy","tag-string","entry","simple"],"_links":{"self":[{"href":"https:\/\/zxi.mytechroad.com\/blog\/wp-json\/wp\/v2\/posts\/10082","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zxi.mytechroad.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zxi.mytechroad.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zxi.mytechroad.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zxi.mytechroad.com\/blog\/wp-json\/wp\/v2\/comments?post=10082"}],"version-history":[{"count":2,"href":"https:\/\/zxi.mytechroad.com\/blog\/wp-json\/wp\/v2\/posts\/10082\/revisions"}],"predecessor-version":[{"id":10084,"href":"https:\/\/zxi.mytechroad.com\/blog\/wp-json\/wp\/v2\/posts\/10082\/revisions\/10084"}],"wp:attachment":[{"href":"https:\/\/zxi.mytechroad.com\/blog\/wp-json\/wp\/v2\/media?parent=10082"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zxi.mytechroad.com\/blog\/wp-json\/wp\/v2\/categories?post=10082"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zxi.mytechroad.com\/blog\/wp-json\/wp\/v2\/tags?post=10082"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}