{"id":7668,"date":"2024-03-26T22:40:51","date_gmt":"2024-03-26T14:40:51","guid":{"rendered":"https:\/\/zyrastory.com\/?p=7668"},"modified":"2024-03-26T22:40:53","modified_gmt":"2024-03-26T14:40:53","slug":"codeforces-630a-again-twenty-five-solution-and-explanation-en","status":"publish","type":"post","link":"https:\/\/zyrastory.com\/en\/coding-en\/codeforces-en\/codeforces-630a-again-twenty-five-solution-and-explanation-en\/","title":{"rendered":"Codeforces 630A Again Twenty Five! Solution &#038; Explanation"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_65 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >\u5167\u5bb9\u76ee\u9304<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" 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: #999;color:#999\" 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><\/span><\/a><\/span><\/div>\n<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:\/\/zyrastory.com\/en\/coding-en\/codeforces-en\/codeforces-630a-again-twenty-five-solution-and-explanation-en\/#problem-description\" title=\"Problem Description\">Problem Description<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/zyrastory.com\/en\/coding-en\/codeforces-en\/codeforces-630a-again-twenty-five-solution-and-explanation-en\/#solution\" title=\"Solution\">Solution<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/zyrastory.com\/en\/coding-en\/codeforces-en\/codeforces-630a-again-twenty-five-solution-and-explanation-en\/#c-solution\" title=\"C# Solution\">C# Solution<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/zyrastory.com\/en\/coding-en\/codeforces-en\/codeforces-630a-again-twenty-five-solution-and-explanation-en\/#java-solution\" title=\"Java Solution\">Java Solution<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/zyrastory.com\/en\/coding-en\/codeforces-en\/codeforces-630a-again-twenty-five-solution-and-explanation-en\/#conclusion\" title=\"Conclusion\">Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n\n<p>Difficulty : 800<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"problem-description\"><\/span><strong>Problem Description<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The HR manager was disappointed again. The last applicant failed the interview the same way as 24 previous ones. &#8220;Do I give such a hard task?&#8221; \u2014 the HR manager thought. &#8220;Just raise number&nbsp;5&nbsp;to the power of&nbsp;<em>n<\/em>&nbsp;and get last two digits of the number. Yes, of course,&nbsp;<em>n<\/em>&nbsp;can be rather big, and one cannot find the power using a calculator, but we need people who are able to think, not just follow the instructions.&#8221;<\/p>\n\n\n\n<p>Could you pass the interview in the machine vision company in IT City?<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><strong>Input<\/strong><\/p>\n\n\n\n<p>The only line of the input contains a single integer\u00a0<em>n<\/em>\u00a0(2\u2009\u2264\u2009<em>n<\/em>\u2009\u2264\u20092\u00b710<sup>18<\/sup>) \u2014 the power in which you need to raise number\u00a05.<\/p>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><strong>Output<\/strong><\/p>\n\n\n\n<p>Output the last two digits of\u00a05<sup><em>n<\/em><\/sup>\u00a0without spaces between them.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><strong>Examples<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-border-color has-palette-color-4-border-color has-fixed-layout\"><tbody><tr><td>Input<\/td><td>2<\/td><\/tr><tr><td>Output<\/td><td>25<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"solution\"><\/span><strong>Solution<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>When we observe the powers of 5 from 0 to 10, we can see:<\/p>\n\n\n\n<p>5<sup>0<\/sup> = 1<br>5<sup>1<\/sup> = 5<br>5<sup>2<\/sup> = <strong>25<\/strong><br>5<sup>3<\/sup> = 1<strong>25<\/strong><br>5<sup>4<\/sup> = 6<strong>25<\/strong><br>5<sup>5<\/sup> = 31<strong>25<\/strong><br>5<sup>6<\/sup> = 156<strong>25<\/strong><br>5<sup>7<\/sup> = 781<strong>25<\/strong><br>5<sup>8<\/sup> = 3906<strong>25<\/strong><br>5<sup>9<\/sup> = 19531<strong>25<\/strong><br>5<sup>10 <\/sup>= 97656<strong>25<\/strong><\/p>\n\n\n\n<p>When n is greater than or equal to 2, regardless of the value of n, the last two digits of 5 raised to the power of n will always be 25. This is because each multiplication of 5&#8217;s power ends with 5, and when n is greater than or equal to 2, there are at least two 5s being multiplied together, resulting in the number necessarily ending with 25.<\/p>\n\n\n\n<p>And in the problem description, the given power of 5 is equal to or greater than two, so we can print 25 without any doubt.<\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"c-solution\"><\/span><strong>C# Solution<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Solution1<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism undefined-numbers lang-csharp\" data-lang=\"C#\"><code>Console.WriteLine(25);<\/code><\/pre><\/div>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"java-solution\"><\/span><strong>Java Solution<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Solution1<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism undefined-numbers lang-java\" data-lang=\"Java\"><code>public class Main {\n    public static void main(String[] args) {\n        System.out.println(25);\n    }\n}<\/code><\/pre><\/div>\n\n\n\n<div style=\"height:15px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<ins class=\"klk-aff-widget\"  data-adid=\"833277\" data-lang=\"\" data-currency=\"\" data-cardH=\"126\" data-padding=\"92\" data-lgH=\"470\" data-edgeValue=\"655\" data-cid=\"-1\" data-tid=\"-1\" data-amount=\"4\" data-prod=\"dynamic_widget\"><a href=\"\/\/www.klook.com\/\">Klook.com<\/a><\/ins>\n<script type=\"text\/javascript\">\n  (function (d, sc, u) {\n    var s = d.createElement(sc),\n      p = d.getElementsByTagName(sc)[0];\n    s.type = \"text\/javascript\";\n    s.async = true;\n    s.src = u;\n    p.parentNode.insertBefore(s, p);\n  })(\n    document,\n    \"script\",\n    \"https:\/\/affiliate.klook.com\/widget\/fetch-iframe-init.js\"\n  );\n<\/script>\n\n\n\n<div style=\"height:15px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"tw-target-text\"><span class=\"ez-toc-section\" id=\"conclusion\"><\/span><strong>Conclusion<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Rather than testing programming skills, it feels like this question tests observation skills more. <\/p>\n\n\n\n<p>This is also highly significant in practical scenarios.<\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-medium-font-size\">\ud83e\udde1<strong>If my solution helps, that is my honor!<\/strong><\/p>\n\n\n\n<p class=\"has-medium-font-size\">\ud83e\udde1<strong>You can support me by sharing my posts, thanks you~~<\/strong><\/p>\n\n\n\n<p><strong>\u2705If you got any problem about the explanation or you need other programming language solution, please feel free to let me know !!<\/strong><\/p>\n\n\n\n<div style=\"height:40px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><strong>The problem link :<\/strong> <a href=\"https:\/\/codeforces.com\/problemset\/problem\/630\/A\" target=\"_blank\" rel=\"noreferrer noopener\">Problem &#8211; 630A &#8211; Codeforces<\/a><\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><strong>Random Codeforces Posts<\/strong><\/p>\n\n\n\n\t\t\t<div class=\"wp-block-uagb-post-grid uagb-post-grid  uagb-post__image-position-top uagb-post__image-disabled uagb-block-613bccac     uagb-post__items uagb-post__columns-3 is-grid uagb-post__columns-tablet-2 uagb-post__columns-mobile-1 uagb-post__equal-height\" data-total=\"12\" style=\"\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t<article class=\"uagb-post__inner-wrap\">\t\t\t\t\t\t\t\t<h4 class=\"uagb-post__title uagb-post__text\">\n\t\t\t\t<a href=\"https:\/\/zyrastory.com\/en\/coding-en\/codeforces-en\/codeforces-758a-holiday-of-equality-solution-and-explanation-en\/\" target=\"_self\" rel=\"bookmark noopener noreferrer\">Codeforces 758A Holiday Of Equality Solution &amp; Explanation<\/a>\n\t\t\t<\/h4>\n\t\t\t\t\t\t<div class='uagb-post__text uagb-post-grid-byline'>\n\t\t\t\t\t\t\t\t<time datetime=\"2024-03-31T22:01:49+08:00\" class=\"uagb-post__date\">\n\t\t\t\t<span class=\"dashicons-calendar dashicons\"><\/span>\t\t\t\t\t2024-03-31\t\t\t\t<\/time>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<div class=\"uagb-post__text uagb-post__cta wp-block-button\">\n\t\t\t\t<a class=\"wp-block-button__link uagb-text-link\" href=\"https:\/\/zyrastory.com\/en\/coding-en\/codeforces-en\/codeforces-758a-holiday-of-equality-solution-and-explanation-en\/\" target=\"_self\" rel=\"bookmark noopener noreferrer\">Read More<\/a>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t<\/article>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<article class=\"uagb-post__inner-wrap\">\t\t\t\t\t\t\t\t<h4 class=\"uagb-post__title uagb-post__text\">\n\t\t\t\t<a href=\"https:\/\/zyrastory.com\/en\/coding-en\/codeforces-en\/codeforces-282b-painting-eggs-solution-and-explanation-en\/\" target=\"_self\" rel=\"bookmark noopener noreferrer\">Codeforces 282B Painting Eggs Solution &#038; 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Explanation<\/a>\n\t\t\t<\/h4>\n\t\t\t\t\t\t<div class='uagb-post__text uagb-post-grid-byline'>\n\t\t\t\t\t\t\t\t<time datetime=\"2024-04-19T23:58:40+08:00\" class=\"uagb-post__date\">\n\t\t\t\t<span class=\"dashicons-calendar dashicons\"><\/span>\t\t\t\t\t2024-04-19\t\t\t\t<\/time>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<div class=\"uagb-post__text uagb-post__cta wp-block-button\">\n\t\t\t\t<a class=\"wp-block-button__link uagb-text-link\" href=\"https:\/\/zyrastory.com\/en\/coding-en\/codeforces-en\/codeforces-490a-team-olympiad-solution-and-explanation-en\/\" target=\"_self\" rel=\"bookmark noopener noreferrer\">Read More<\/a>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t<\/article>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"uagb-post-pagination-wrap\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t","protected":false},"excerpt":{"rendered":"<p>Rather than testing programming skills, it feels like this question tests observation skills more.  <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","footnotes":""},"categories":[269],"tags":[],"blocksy_meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Codeforces 630A Again Twenty Five! 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