602 lines
18 KiB
HTML
602 lines
18 KiB
HTML
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<!DOCTYPE html>
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<html>
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<head>
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<title>A - Happy Birthday!</title>
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gtag('js', new Date());
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gtag('config', 'G-RC512FD18N');
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<meta name="description" content="AtCoder is a programming contest site for anyone from beginners to experts. We hold weekly programming contests online.">
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<meta property="og:title" content="A - Happy Birthday!" />
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<meta property="og:description" content="AtCoder is a programming contest site for anyone from beginners to experts. We hold weekly programming contests online." />
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var LANG = "en";
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var csrfToken = "RRHWPnDZqM+tdZpgbKRjH5FxiX5spw9S3/HKRbnyqok="
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<script>
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var contestScreenName = "abc100";
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var countDownText = "Contest begins in";
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var startTime = moment("2018-06-16T21:00:00+09:00");
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var endTime = moment("2018-06-16T22:40:00+09:00");
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<script src="//img.atcoder.jp/public/6372bb3/js/base.js"></script>
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<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
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<h4 class="modal-title">Contest started</h4>
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<p>AtCoder Beginner Contest 100 has begun.</p>
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<h4 class="modal-title">Contest is over</h4>
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<p>AtCoder Beginner Contest 100 has ended.</p>
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<span class="icon-bar"></span><span class="icon-bar"></span><span class="icon-bar"></span>
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</button>
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</div>
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<div class="collapse navbar-collapse" id="navbar-collapse">
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<ul class="nav navbar-nav">
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<li><a class="contest-title" href="/contests/abc100">AtCoder Beginner Contest 100</a></li>
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</a>
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<li><a href="/contests/abc100/tasks/abc100_a?lang=en"><img src='//img.atcoder.jp/assets/top/img/flag-lang/en.png'> English</a></li>
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<form method="POST" name="form_logout" action="/logout?continue=https%3A%2F%2Fatcoder.jp%2Fcontests%2Fabc100%2Ftasks%2Fabc100_a">
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<input type="hidden" name="csrf_token" value="RRHWPnDZqM+tdZpgbKRjH5FxiX5spw9S3/HKRbnyqok=" />
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</form>
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<div id="main-container" class="container"
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style="padding-top:50px;">
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<div class="row">
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<div id="contest-nav-tabs" class="col-sm-12 mb-2 cnvtb-fixed">
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<div>
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<small class="contest-duration">
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Contest Duration:
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<a href='http://www.timeanddate.com/worldclock/fixedtime.html?iso=20180616T2100&p1=248' target='blank'><time class='fixtime fixtime-full'>2018-06-16 21:00:00+0900</time></a> - <a href='http://www.timeanddate.com/worldclock/fixedtime.html?iso=20180616T2240&p1=248' target='blank'><time class='fixtime fixtime-full'>2018-06-16 22:40:00+0900</time></a> (local time)
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(100 minutes)
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</small>
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<small class="back-to-home pull-right"><a href="/home">Back to Home</a></small>
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</div>
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<ul class="nav nav-tabs">
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<li><a href="/contests/abc100"><span class="glyphicon glyphicon-home" aria-hidden="true"></span> Top</a></li>
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<li class="active"><a href="/contests/abc100/tasks"><span class="glyphicon glyphicon-tasks" aria-hidden="true"></span> Tasks</a></li>
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<li><a href="/contests/abc100/clarifications"><span class="glyphicon glyphicon-question-sign" aria-hidden="true"></span> Clarifications <span id="clar-badge" class="badge" ></span></a></li>
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<li>
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<a class="dropdown-toggle" data-toggle="dropdown" href="#" role="button" aria-haspopup="true" aria-expanded="false"><span class="glyphicon glyphicon-list" aria-hidden="true"></span> Results<span class="caret"></span></a>
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<ul class="dropdown-menu">
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<li><a href="/contests/abc100/submissions"><span class="glyphicon glyphicon-globe" aria-hidden="true"></span> All Submissions</a></li>
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</ul>
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</li>
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<li><a href="/contests/abc100/standings"><span class="glyphicon glyphicon-sort-by-attributes-alt" aria-hidden="true"></span> Standings</a></li>
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<li><a href="/contests/abc100/standings/virtual"><span class="glyphicon glyphicon-sort-by-attributes-alt" aria-hidden="true"></span> Virtual Standings</a></li>
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<li><a href="/contests/abc100/editorial"><span class="glyphicon glyphicon-book" aria-hidden="true"></span> Editorial</a></li>
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<li class="pull-right"><a id="fix-cnvtb" href="javascript:void(0)"><span class="glyphicon glyphicon-pushpin" aria-hidden="true"></span></a></li>
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</ul>
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</div>
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<div class="col-sm-12">
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<span class="h2">
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A - Happy Birthday!
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<a class="btn btn-default btn-sm" href="/contests/abc100/tasks/abc100_a/editorial">Editorial</a>
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</span>
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<span id="task-lang-btn" class="pull-right"><span data-lang="ja"><img src='//img.atcoder.jp/assets/top/img/flag-lang/ja.png'></span> / <span data-lang="en"><img src='//img.atcoder.jp/assets/top/img/flag-lang/en.png'></span></span>
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<script>
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$(function() {
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var ts = $('#task-statement span.lang');
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if (ts.children('span').size() <= 1) {
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$('#task-lang-btn').hide();
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ts.children('span').show();
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return;
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}
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var REMEMBER_LB = 5;
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var LS_KEY = 'task_lang';
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var taskLang = getLS(LS_KEY) || '';
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function isTaskLangSet(taskLang) { return taskLang === 'ja' || taskLang === 'en';}
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if (isTaskLangSet(taskLang)) {
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const params = new URLSearchParams(window.location.search);
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if (params.get('lang')) {
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setLS(LS_KEY, REMEMBER_LB);
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taskLang = LANG;
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}
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} else {
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taskLang = LANG;
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}
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ts.children('span.lang-' + taskLang).show();
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$('#task-lang-btn span').click(function() {
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var l = $(this).data('lang');
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ts.children('span').hide();
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ts.children('span.lang-' + l).show();
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taskLang = getLS(LS_KEY) || '';
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let changeTimes = 0;
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if (isTaskLangSet(taskLang)) {
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changeTimes = REMEMBER_LB;
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} else {
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changeTimes = parseInt(taskLang, 10);
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if (isNaN(changeTimes)) changeTimes = 0;
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changeTimes++;
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}
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if (changeTimes < REMEMBER_LB) setLS(LS_KEY, changeTimes);
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else setLS(LS_KEY, l);
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});
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});
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</script>
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<hr/>
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<p>
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Time Limit: 2 sec / Memory Limit: 976 MiB
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</p>
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<div id="task-statement">
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<span class="lang">
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<span class="lang-ja">
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<p>配点: <var>100</var> 点 </p>
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<div class="part">
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<section>
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<h3>問題文</h3>
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<p>もうすぐ E869120 君と square1001 君の <var>16</var> 才の誕生日が来る.<br />
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そこで, AtCoder 王国の高橋君は, 円形のケーキ <var>1</var> 個に放射状に切れ目を入れ <var>16</var> 等分したものを, 彼らにプレゼントした. </p>
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<p>E869120 君はそのうち <var>A</var> 切れ、square1001 君は <var>B</var> 切れを食べようとした.<br />
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しかし, ケーキと一緒についていた紙を見ると, 「同じ人が隣り合う <var>2</var> 切れのケーキを両方取ってはならない」と書かれていた. </p>
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<p>さて、彼らは紙に書かれたことを守って、<var>2</var> 人とも食べたい数のケーキを取ることができるだろうか？ </p>
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</section>
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</div>
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<div class="part">
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<section>
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<h3>制約</h3>
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<ul>
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<li><var>A, B</var> は <var>1</var> 以上 <var>16</var> 以下の整数</li>
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<li><var>A+B</var> は <var>16</var> 以下である.</li>
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</ul>
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</section>
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</div>
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<hr />
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<div class="io-style">
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<div class="part">
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<section>
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<h3>入力</h3>
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<p>入力は以下の形式で標準入力から与えられる. </p>
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<pre><var>A</var> <var>B</var>
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</pre>
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</section>
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</div>
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<div class="part">
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<section>
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<h3>出力</h3>
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<p>紙に書かれたことを守って, E869120 君と square1001 君両方が, 食べたい数のケーキを取ることができるならば <code>Yay!</code>, そうでなければ <code>:(</code> と出力しなさい.</p>
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</section>
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</div>
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</div>
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<hr />
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<div class="part">
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<section>
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<h3>入力例 1</h3><pre>5 4
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</pre>
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</section>
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</div>
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<div class="part">
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<section>
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<h3>出力例 1</h3><pre>Yay!
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</pre>
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<p>下の図のようにケーキを取れば、<var>2</var> 人とも目標を達成することができる.<br />
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<img alt=" " src="https://img.atcoder.jp/abc100/e87fa456a900ac9ae36671ae8bd5eeea.png" /></p>
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</section>
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</div>
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<hr />
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<div class="part">
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<section>
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<h3>入力例 2</h3><pre>8 8
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</pre>
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</section>
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</div>
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<div class="part">
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<section>
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<h3>出力例 2</h3><pre>Yay!
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</pre>
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<p>下の図のようにケーキを取れば、<var>2</var> 人とも目標を達成することができる.<br />
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<img alt=" " src="https://img.atcoder.jp/abc100/a7989ac033e6ba86e14078864c20d9c5.png" /></p>
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</section>
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</div>
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<hr />
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<div class="part">
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<section>
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<h3>入力例 3</h3><pre>11 4
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</pre>
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</section>
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</div>
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<div class="part">
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<section>
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<h3>出力例 3</h3><pre>:(
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</pre>
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<p>この場合, 残念ながら目標を達成する方法は <var>1</var> つもない. </p></section>
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</div>
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|
</span>
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|
<span class="lang-en">
|
|
<p>Score: <var>100</var> points</p>
|
|
|
|
<div class="part">
|
|
<section>
|
|
<h3>Problem Statement</h3>
|
|
<p>E869120's and square1001's <var>16</var>-th birthday is coming soon.<br />
|
|
Takahashi from AtCoder Kingdom gave them a round cake cut into <var>16</var> equal fan-shaped pieces.</p>
|
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<p>E869120 and square1001 were just about to eat <var>A</var> and <var>B</var> of those pieces, respectively,<br />
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when they found a note attached to the cake saying that "the same person should not take two adjacent pieces of cake".</p>
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<p>Can both of them obey the instruction in the note and take desired numbers of pieces of cake?</p>
|
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</section>
|
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</div>
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<div class="part">
|
|
<section>
|
|
<h3>Constraints</h3>
|
|
<ul>
|
|
<li><var>A</var> and <var>B</var> are integers between <var>1</var> and <var>16</var> (inclusive).</li>
|
|
<li><var>A+B</var> is at most <var>16</var>.</li>
|
|
</ul>
|
|
</section>
|
|
</div>
|
|
|
|
<hr />
|
|
|
|
<div class="io-style">
|
|
<div class="part">
|
|
<section>
|
|
<h3>Input</h3>
|
|
<p>Input is given from Standard Input in the following format:</p>
|
|
<pre><var>A</var> <var>B</var>
|
|
</pre>
|
|
|
|
</section>
|
|
</div>
|
|
|
|
<div class="part">
|
|
<section>
|
|
<h3>Output</h3>
|
|
<p>If both E869120 and square1001 can obey the instruction in the note and take desired numbers of pieces of cake, print <code>Yay!</code>; otherwise, print <code>:(</code>.</p>
|
|
</section>
|
|
</div>
|
|
</div>
|
|
|
|
<hr />
|
|
|
|
<div class="part">
|
|
<section>
|
|
<h3>Sample Input 1</h3><pre>5 4
|
|
</pre>
|
|
|
|
</section>
|
|
</div>
|
|
|
|
<div class="part">
|
|
<section>
|
|
<h3>Sample Output 1</h3><pre>Yay!
|
|
</pre>
|
|
|
|
<p>Both of them can take desired number of pieces as follows:
|
|
<img alt=" " src="https://img.atcoder.jp/abc100/e87fa456a900ac9ae36671ae8bd5eeea.png" /></p>
|
|
</section>
|
|
</div>
|
|
|
|
<hr />
|
|
|
|
<div class="part">
|
|
<section>
|
|
<h3>Sample Input 2</h3><pre>8 8
|
|
</pre>
|
|
|
|
</section>
|
|
</div>
|
|
|
|
<div class="part">
|
|
<section>
|
|
<h3>Sample Output 2</h3><pre>Yay!
|
|
</pre>
|
|
|
|
<p>Both of them can take desired number of pieces as follows:
|
|
<img alt=" " src="https://img.atcoder.jp/abc100/a7989ac033e6ba86e14078864c20d9c5.png" /></p>
|
|
</section>
|
|
</div>
|
|
|
|
<hr />
|
|
|
|
<div class="part">
|
|
<section>
|
|
<h3>Sample Input 3</h3><pre>11 4
|
|
</pre>
|
|
|
|
</section>
|
|
</div>
|
|
|
|
<div class="part">
|
|
<section>
|
|
<h3>Sample Output 3</h3><pre>:(
|
|
</pre>
|
|
|
|
<p>In this case, there is no way for them to take desired number of pieces, unfortunately.</p></section>
|
|
</div>
|
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</span>
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</span>
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