add _static

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2026-04-27 09:44:16 +09:00
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<!DOCTYPE html>
<html lang="ko">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>BOJ 14527 - Offline</title>
<style>
:root {
--bg: #fafaf8;
--paper: #ffffff;
--ink: #1e1f24;
--muted: #6a6d75;
--line: #d8dce3;
--accent: #0d6e6e;
--code-bg: #f4f6fb;
}
* { box-sizing: border-box; }
body {
margin: 0;
background:
radial-gradient(circle at 15% 0%, #f0efe9 0%, transparent 42%),
radial-gradient(circle at 85% 20%, #e7f1f2 0%, transparent 38%),
var(--bg);
color: var(--ink);
font-family: "Noto Sans KR", "Pretendard", "Apple SD Gothic Neo", sans-serif;
line-height: 1.65;
}
main {
max-width: 980px;
margin: 0 auto;
padding: 24px 16px 56px;
}
.header {
background: var(--paper);
border: 1px solid var(--line);
border-radius: 14px;
padding: 18px 20px;
margin-bottom: 18px;
}
.header h1 { margin: 0 0 6px; font-size: 1.5rem; }
.header p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.header a { color: var(--accent); text-decoration: none; }
.section {
background: var(--paper);
border: 1px solid var(--line);
border-radius: 14px;
padding: 16px 18px;
margin-bottom: 14px;
overflow-x: auto;
}
h2 {
margin: 0 0 10px;
font-size: 1.05rem;
color: var(--accent);
border-bottom: 1px solid var(--line);
padding-bottom: 8px;
}
pre, code {
font-family: "JetBrains Mono", "Fira Code", monospace;
background: var(--code-bg);
}
pre {
padding: 12px;
border-radius: 10px;
border: 1px solid #e7ebf2;
overflow: auto;
}
blockquote {
margin: 14px 0;
padding: 16px 16px 14px 22px;
border-left: 4px solid var(--accent);
border-radius: 10px;
background: linear-gradient(90deg, #eef8f8 0%, #f9fdfd 100%);
color: #24313a;
font-weight: 600;
position: relative;
}
blockquote::before {
content: "“";
position: absolute;
left: 8px;
top: 2px;
font-size: 1.35rem;
line-height: 1;
color: #0b5f5f;
opacity: 0.7;
}
blockquote > :first-child { margin-top: 0; }
blockquote > :last-child { margin-bottom: 0; }
q {
color: #114f50;
font-weight: 700;
background: #edf8f8;
border-radius: 6px;
padding: 0 4px;
}
.math-inline math {
font-size: 1em;
vertical-align: middle;
}
.math-block {
margin: 10px 0;
padding: 8px 10px;
overflow-x: auto;
background: #f8fbff;
border: 1px solid #e2ecf8;
border-radius: 8px;
}
.math-block math {
font-size: 1.04em;
display: block;
}
table { border-collapse: collapse; width: 100%; }
th, td { border: 1px solid var(--line); padding: 6px 8px; }
img { max-width: 100%; height: auto; }
</style>
</head>
<body>
<main>
<header class="header">
<h1>Paired Up</h1>
</header>
<article class="section">
<h2>문제</h2>
<p>Farmer John finds that his cows are each easier to milk when they have another cow nearby for moral support. He therefore wants to take his \(M\) cows (\(M \leq 1,000,000,000\), \(M\) even) and partition them into \(M/2\) pairs. Each pair of cows will then be ushered off to a separate stall in the barn for milking. The milking in each of these \(M/2\) stalls will take place simultaneously.</p>
<p>To make matters a bit complicated, each of Farmer John&#39;s cows has a different milk output. If cows of milk outputs \(A\) and \(B\) are paired up, then it takes a total of \(A+B\) units of time to milk them both.</p>
<p>Please help Farmer John determine the minimum possible amount of time the entire milking process will take to complete, assuming he pairs the cows up in the best possible way.</p>
</article>
<article class="section">
<h2>입력</h2>
<p>The first line of input contains \(N\) (\(1 \leq N \leq 100,000\)). Each of the next \(N\) lines contains two integers \(x\) and \(y\), indicating that FJ has \(x\) cows each with milk output \(y\) (\(1 \leq y \leq 1,000,000,000\)). The sum of the \(x\)&#39;s is \(M\), the total number of cows.</p>
</article>
<article class="section">
<h2>출력</h2>
<p>Print out the minimum amount of time it takes FJ&#39;s cows to be milked, assuming they are optimally paired up.</p>
</article>
<article class="section">
<h2>힌트</h2>
<p>Here, if the cows with outputs 8+2 are paired up, and those with outputs 5+5 are paired up, the both stalls take 10 units of time for milking. Since milking takes place simultaneously, the entire process would therefore complete after 10 units of time. Any other pairing would be sub-optimal, resulting in a stall taking more than 10 units of time to milk.</p>
</article>
<article class="section">
<h2>예제 입력 1 복사</h2>
<pre class="sampledata" id="sample-input-1">3
1 8
2 5
1 2
</pre>
</article>
<article class="section">
<h2>예제 출력 1 복사</h2>
<pre class="sampledata" id="sample-output-1">10
</pre>
</article>
</main>
</body>
</html>