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<title>問題 #3 - 回答 #93 | Albatross.PHP</title>
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<h1 class="mb-4">問題 #3 - 回答 #93</h1>
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<ol class="breadcrumb">
<li class="breadcrumb-item"><a href="../../../../index.html">問題一覧</a></li>
<li class="breadcrumb-item"><a href="../../index.html">Brainf*ck</a></li>
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<li class="breadcrumb-item active">#93</li>
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<h2>Brainf*ck</h2>
<p>
Brainf*ck を実装してください。標準入力から Brainf*ck のソースコードが渡されます。Brainf*ck の仕様のうち、入力命令である「,」は未実装で構いません。
一部明確に挙動が定められていない部分については、以下の仕様とします。
メモリの各セルは 8 bit の符号なし整数です。今回の入力でオーバーフローは発生しません。
メモリのアドレスは非負整数です。今回の入力で負のアドレスへポインタを動かすことはありません。
Brainf*ck に存在する命令以外の文字を受け取った場合は無視してください。
今回の入力に不正なプログラムは含まれません。すなわち、「[」と「]」は必ず釣り合っています。
</p>
<h2>回答 #93</h2>
<p>
tsbkw が 2024-03-09 11:48:35 に投稿
</p>
<h2>コード</h2>
<p>
327 byte
</p>
<pre><code class="hljs language-php">$p=0;for($s=stream_get_contents(STDIN);$p<strlen($s);)switch($s[$p++]){case'>':$p++;break;case'<':$p--;break;case'+':$m[$p]++;break;case'-':$m[$p]--;break;case'.':echo chr($m[$p]);break;case'[':if(!$m[$p])for($d=1;++$p;$d+=$s[$p]=='['?-1:($s[$p]==']'));break;case']':if($m[$p])for($d=-1;--$p;$d+=$s[$p]==']'?-1:($s[$p]=='['));}</code></pre>
<h2>実行結果</h2>
<div class="js-phper-token">
</div>
<div class="mt-3">
ステータス: <span class="js-aggregated-execution-status" data-answer-id="487">失敗</span>
</div>
<div class="mt-3">
<h3>テストケース 1</h3>
<div>
ステータス: <span class="js-testcase-execution-status" data-testcase-execution-id="1121">時間制限超過</span>
</div>
<h4>標準出力</h4>
<pre><code class="js-testcase-execution-stdout hljs language-plaintext" data-testcase-execution-id="1121"></code></pre>
<h4>標準エラー出力</h4>
<pre><code class="js-testcase-execution-stderr hljs language-plaintext" data-testcase-execution-id="1121">Time Limit Exceeded: 10000 msec</code></pre>
<h3>テストケース 2</h3>
<div>
ステータス: <span class="js-testcase-execution-status" data-testcase-execution-id="1122">不正解</span>
</div>
<h4>標準出力</h4>
<pre><code class="js-testcase-execution-stdout hljs language-plaintext" data-testcase-execution-id="1122">
Warning: Undefined variable $m in php.wasm code on line 6
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Warning: Undefined array key 81 in php.wasm code on line 6
Deprecated: chr(): Passing null to parameter #1 ($codepoint) of type int is deprecated in php.wasm code on line 6
</code></pre>
<h4>標準エラー出力</h4>
<pre><code class="js-testcase-execution-stderr hljs language-plaintext" data-testcase-execution-id="1122">
</code></pre>
<h3>テストケース 3</h3>
<div>
ステータス: <span class="js-testcase-execution-status" data-testcase-execution-id="1123">時間制限超過</span>
</div>
<h4>標準出力</h4>
<pre><code class="js-testcase-execution-stdout hljs language-plaintext" data-testcase-execution-id="1123"></code></pre>
<h4>標準エラー出力</h4>
<pre><code class="js-testcase-execution-stderr hljs language-plaintext" data-testcase-execution-id="1123">Time Limit Exceeded: 10000 msec</code></pre>
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