{"id":1932,"date":"2021-05-28T19:59:34","date_gmt":"2021-05-28T14:29:34","guid":{"rendered":"https:\/\/www.codingbroz.com\/?p=1932"},"modified":"2021-06-20T22:27:07","modified_gmt":"2021-06-20T16:57:07","slug":"day-8-dictionaries-and-maps-solution","status":"publish","type":"post","link":"https:\/\/www.codingbroz.com\/day-8-dictionaries-and-maps-solution\/","title":{"rendered":"Day 8: Dictionaries and Maps | 30 Days Of Code | HackerRank Solution"},"content":{"rendered":"\n<p>Hello coders, today we are going to solve <strong>Day 8: Dictionaries and Maps HackerRank Solution<\/strong> in<strong> C++<\/strong>, <strong>Java<\/strong> and <strong>Python<\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/05\/day-8-dictionaries-and-maps-30-days-of-code-solution-codingbroz.png\" alt=\"Day 8: Dictionaries and Maps\" class=\"wp-image-1934\" srcset=\"https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/05\/day-8-dictionaries-and-maps-30-days-of-code-solution-codingbroz.png 1200w, https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/05\/day-8-dictionaries-and-maps-30-days-of-code-solution-codingbroz-768x432.png 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_65 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<label for=\"ez-toc-cssicon-toggle-item-66364238591e5\" class=\"ez-toc-cssicon-toggle-label\"><label class=\"ez-toc-title\">Table of Contents<\/label>\n<span class=\"ez-toc-cssicon\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #0090ff;color:#0090ff\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #0090ff;color:#0090ff\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-66364238591e5\" checked \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.codingbroz.com\/day-8-dictionaries-and-maps-solution\/#Objective\" title=\"Objective\">Objective<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.codingbroz.com\/day-8-dictionaries-and-maps-solution\/#Task\" title=\"Task\">Task<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.codingbroz.com\/day-8-dictionaries-and-maps-solution\/#Input_Format\" title=\"Input Format\">Input Format<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.codingbroz.com\/day-8-dictionaries-and-maps-solution\/#Constraints\" title=\"Constraints\">Constraints<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.codingbroz.com\/day-8-dictionaries-and-maps-solution\/#Output_Format\" title=\"Output Format\">Output Format<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.codingbroz.com\/day-8-dictionaries-and-maps-solution\/#Solution_%E2%80%93_Day_8_Dictionaries_and_Maps\" title=\"Solution &#8211; Day 8: Dictionaries and Maps\">Solution &#8211; Day 8: Dictionaries and Maps<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.codingbroz.com\/day-8-dictionaries-and-maps-solution\/#C\" title=\"C++\">C++<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.codingbroz.com\/day-8-dictionaries-and-maps-solution\/#Java\" title=\"Java\">Java<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.codingbroz.com\/day-8-dictionaries-and-maps-solution\/#Python\" title=\"Python\">Python<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Objective\"><\/span><strong>Objective<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Today, we&#8217;re learning about Key-Value pair mappings using a&nbsp;<em>Map<\/em>&nbsp;or&nbsp;<em>Dictionary<\/em>&nbsp;data structure.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Task\"><\/span><strong>Task<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Given&nbsp;<strong><em>n<\/em><\/strong>&nbsp;names and phone numbers, assemble a phone book that maps friends&#8217; names to their respective phone numbers. You will then be given an unknown number of names to query your phone book for. For each&nbsp;<em><strong>name<\/strong><\/em>&nbsp;queried, print the associated entry from your phone book on a new line in the form&nbsp;<code>name=phoneNumber<\/code>; if an entry for&nbsp;<em><strong>name<\/strong><\/em>&nbsp;is not found, print&nbsp;<code>Not found<\/code>&nbsp;instead.<\/p>\n\n\n\n<p><strong>Note:<\/strong>&nbsp;Your phone book should be a Dictionary\/Map\/HashMap data structure.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Input_Format\"><\/span><strong>Input Format<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The first line contains an integer,<strong><em>&nbsp;<\/em><\/strong><em><strong>n<\/strong><\/em>, denoting the number of entries in the phone book.<br>Each of the&nbsp;<em><strong>n<\/strong><\/em>&nbsp;subsequent lines describes an entry in the form of&nbsp;<strong>2<\/strong>&nbsp;space-separated values on a single line. The first value is a friend&#8217;s name, and the second value is an&nbsp;<strong>8<\/strong>-digit phone number.<\/p>\n\n\n\n<p>After the&nbsp;<em><strong>n<\/strong><\/em>&nbsp;lines of phone book entries, there are&nbsp;<em>an unknown number of lines of queries<\/em>. Each line (query) contains a&nbsp;<strong><em>name<\/em><\/strong>&nbsp;to look up, and you must continue reading lines until there is no more input.<\/p>\n\n\n\n<p><strong>Note:<\/strong>&nbsp;Names consist of lowercase English alphabetic letters and are&nbsp;<em>first names<\/em>&nbsp;only.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Constraints\"><\/span><strong>Constraints<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul><li><strong>1 &lt;= <em>n<\/em> &lt;= 10<sup>5<\/sup><\/strong><\/li><li><strong>1 &lt;= <em>queries<\/em> &lt;= <strong>10<sup>5<\/sup><\/strong><\/strong><\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Output_Format\"><\/span><strong>Output Format<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>On a new line for each query, print&nbsp;<code>Not found<\/code>&nbsp;if the name has no corresponding entry in the phone book; otherwise, print the full&nbsp;<strong><em>name<\/em><\/strong>&nbsp;and&nbsp;<em><strong>phoneNumber<\/strong><\/em>&nbsp;in the format&nbsp;<code>name=phoneNumber<\/code>.<\/p>\n\n\n\n<p><strong>Sample Input<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>3\nsam 99912222\ntom 11122222\nharry 12299933\nsam\nedward\nharry<\/code><\/pre>\n\n\n\n<p><strong>Sample Output<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sam=99912222\nNot found\nharry=12299933<\/code><\/pre>\n\n\n\n<p><strong>Explanation<\/strong><\/p>\n\n\n\n<p>We add the following&nbsp;<strong><em>n<\/em> = 3<\/strong>&nbsp;<em>(Key,Value)<\/em>&nbsp;pairs to our map so it looks like this:<\/p>\n\n\n\n<p><strong><em>phoneBook<\/em> = {(<em>sam<\/em>, 99912222), (<em>tom<\/em>, 11122222), (<em>harry<\/em>, 12299933)}<\/strong><\/p>\n\n\n\n<p>We then process each query and print&nbsp;<code>key=value<\/code>&nbsp;if the queried&nbsp;<strong><em>key<\/em><\/strong>&nbsp;is found in the map; otherwise, we print&nbsp;<code>Not found<\/code>.<\/p>\n\n\n\n<p><em>Query 0:<\/em>&nbsp;<code>sam<\/code><br>Sam is one of the keys in our dictionary, so we print&nbsp;<code>sam=99912222<\/code>.<\/p>\n\n\n\n<p><em>Query 1:<\/em>&nbsp;<code>edward<\/code><br>Edward is not one of the keys in our dictionary, so we print&nbsp;<code>Not found<\/code>.<\/p>\n\n\n\n<p><em>Query 2:<\/em>&nbsp;<code>harry<\/code><br>Harry is one of the keys in our dictionary, so we print&nbsp;<code>harry=12299933<\/code>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Solution_%E2%80%93_Day_8_Dictionaries_and_Maps\"><\/span><strong>Solution &#8211; Day 8: Dictionaries and Maps<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"C\"><\/span><strong>C++<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"cpp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include &lt;iostream>\n#include &lt;map>\nusing namespace std;\n\nint main() {\n    std::map&lt;string, string> phoneBook;\n    int n;\n    cin >> n;\n    \n    \/\/ Read names and numbers, add to phoneBook:\n    for(int i = 0; i &lt; n; i++){\n        string name;\n        string phone;\n        cin >> name;\n        cin >> phone;\n        phoneBook[name] = phone;\n    }\n    \n    \/\/ Execute queries:\n    std::map&lt;string,string>::iterator it;\n    string query;\n    while( cin >> query ){\n        it = phoneBook.find(query);\n        \n        if ( it != phoneBook.end() ){ \/\/ key is found in phoneBook    \n            cout &lt;&lt; it->first &lt;&lt; \"=\" &lt;&lt; it->second &lt;&lt; '\\n';\n        }\n        else{ \/\/ the iterator hit the end of the phone book without finding key\n            cout &lt;&lt; \"Not found\" &lt;&lt; '\\n';\n        }\n    }\n    \n    return 0;\n}<\/pre>\n\n\n\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\n<ins class=\"adsbygoogle\"\n     style=\"display:block; text-align:center;\"\n     data-ad-layout=\"in-article\"\n     data-ad-format=\"fluid\"\n     data-ad-client=\"ca-pub-5246141430412355\"\n     data-ad-slot=\"8798433565\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Java\"><\/span><strong>Java<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import java.util.*;\nimport java.io.*;\n\nclass Solution{\n    public static void main(String []argh){\n        Scanner in = new Scanner(System.in);\n        Map&lt;String,Integer> Contact =new HashMap&lt;String,Integer>();\n        int n = in.nextInt();\n        for(int i = 0; i &lt; n; i++){\n            String name = in.next();\n            int phone = in.nextInt();\n            Contact.put(name,phone);\n        }\n        while(in.hasNext()){\n            String s = in.next();\n            if(Contact.containsKey(s)){\n                System.out.println(s+\"=\"+Contact.get(s));\n            }\n            else{\n                System.out.println(\"Not found\");\n            }\n        }\n        in.close();\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Python\"><\/span><strong>Python<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import sys \n\n# Read input and assemble Phone Book\nn = int(input())\nphoneBook = {}\nfor i in range(n):\n    contact = input().split(' ')\n    phoneBook[contact[0]] = contact[1]\n\n# Process Queries\nlines = sys.stdin.readlines()\nfor i in lines:\n    name = i.strip()\n    if name in phoneBook:\n        print(name + '=' + str( phoneBook[name] ))\n    else:\n        print('Not found')<\/pre>\n\n\n\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\n<ins class=\"adsbygoogle\"\n     style=\"display:block; text-align:center;\"\n     data-ad-layout=\"in-article\"\n     data-ad-format=\"fluid\"\n     data-ad-client=\"ca-pub-5246141430412355\"\n     data-ad-slot=\"8798433565\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script>\n\n\n\n<p><strong>Disclaimer:<\/strong> The above Problem <strong>(<a href=\"https:\/\/www.hackerrank.com\/challenges\/30-dictionaries-and-maps\/problem\" target=\"_blank\" rel=\"noreferrer noopener\" class=\"rank-math-link\">Day 8: Dictionaries and Maps<\/a>)<\/strong> is generated by <strong>Hacker Rank<\/strong> but the Solution is Provided by <strong>CodingBroz<\/strong>. This tutorial is only for <strong>Educational<\/strong> and <strong>Learning<\/strong> Purpose.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hello coders, today we are going to solve Day 8: Dictionaries and Maps HackerRank Solution in C++, Java and Python.<\/p>\n","protected":false},"author":1,"featured_media":1934,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[9,160],"tags":[171,80,18],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/05\/day-8-dictionaries-and-maps-30-days-of-code-solution-codingbroz.png","jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/1932"}],"collection":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/comments?post=1932"}],"version-history":[{"count":3,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/1932\/revisions"}],"predecessor-version":[{"id":3521,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/1932\/revisions\/3521"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/media\/1934"}],"wp:attachment":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/media?parent=1932"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/categories?post=1932"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/tags?post=1932"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}