問題 #3 - 回答 #92

Brainf*ck

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。

回答 #92

tsbkw が 2024-03-09 11:46:49 に投稿

コード

322 byte

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]=='['));}

実行結果

ステータス: 失敗

テストケース 1

ステータス: 時間制限超過

標準出力

標準エラー出力

Time Limit Exceeded: 10000 msec

テストケース 2

ステータス: 不正解

標準出力


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標準エラー出力

テストケース 3

ステータス: 時間制限超過

標準出力

標準エラー出力

Time Limit Exceeded: 10000 msec