{"id":205228,"date":"2025-05-29T14:16:06","date_gmt":"2025-05-29T06:16:06","guid":{"rendered":"https:\/\/server.hk\/cnblog\/205228\/"},"modified":"2025-05-29T14:16:06","modified_gmt":"2025-05-29T06:16:06","slug":"%e7%81%ab%e6%9f%b4%e6%a3%8d%e5%8e%8b%e7%bc%a9","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/205228\/","title":{"rendered":"\u706b\u67f4\u68cd\u538b\u7f29"},"content":{"rendered":"

<\/b> <\/p>\n

\u706b\u67f4\u68cd\u538b\u7f29<\/h1>\n

\u4eca\u65e5\u4e0d\u80af\u57cb\u5934\uff0c\u660e\u65e5\u4f55\u4ee5\u62ac\u5934\uff01\u6bcf\u65e5\u4e00\u53e5\u52aa\u529b\u81ea\u5df1\u7684\u8bdd\u54c8\u54c8~\u54c8\u55bd\uff0c\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u7bc7\u300a\u706b\u67f4\u68cd\u538b\u7f29\u300b<\/span>\uff0c\u4e3b\u8981\u5185\u5bb9\u662f\u8bb2\u89e3<\/span>\u7b49\u7b49\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u53ef\u4ee5\u6536\u85cf\u6216\u8005\u6709\u66f4\u597d\u7684\u5efa\u8bae\u5728\u8bc4\u8bba\u63d0\u51fa\uff0c\u6211\u90fd\u4f1a\u8ba4\u771f\u770b\u7684\uff01\u5927\u5bb6\u4e00\u8d77\u8fdb\u6b65\uff0c\u4e00\u8d77\u5b66\u4e60\uff01<\/p>\n

<\/p>\n

\u7a46\u7f55\u9ed8\u5fb7\u00b7s\u00b7\u5b89\u74e6\u5c14 (mohammad s. anwar) \u6bcf\u5468\u90fd\u4f1a\u53d1\u51fa\u201c\u6bcf\u5468\u6311\u6218\u201d\uff0c\u8ba9\u6211\u4eec\u6240\u6709\u4eba\u90fd\u6709\u673a\u4f1a\u4e3a\u4e24\u5468\u7684\u4efb\u52a1\u63d0\u51fa\u89e3\u51b3\u65b9\u6848\u3002\u6211\u7684\u89e3\u51b3\u65b9\u6848\u9996\u5148\u7528python\u7f16\u5199\uff0c\u7136\u540e\u8f6c\u6362\u4e3aperl\u3002\u8fd9\u5bf9\u6211\u4eec\u6240\u6709\u4eba\u6765\u8bf4\u90fd\u662f\u7ec3\u4e60\u7f16\u7801\u7684\u597d\u65b9\u6cd5\u3002<\/p>\n

\u6311\u6218\uff0c\u6211\u7684\u89e3\u51b3\u65b9\u6848<\/p>\n

\u60a8\u5c06\u83b7\u5f97\u4e00\u4e32\u5b57\u6bcd\u5b57\u7b26\uff0c$chars\u3002<\/p>\n

\u7f16\u5199\u4e00\u4e2a\u811a\u672c\uff0c\u4f7f\u7528\u6e38\u7a0b\u7f16\u7801\u6765\u538b\u7f29\u5b57\u7b26\u4e32\uff0c\u5982\u793a\u4f8b\u6240\u793a\u3002<\/p>\n

\u538b\u7f29\u5355\u5143\u53ef\u4ee5\u662f\u5355\u4e2a\u5b57\u7b26\uff0c\u4e5f\u53ef\u4ee5\u662f\u8ba1\u6570\u540e\u8ddf\u4e00\u4e2a\u5b57\u7b26\u3002<\/p>\n

\u5956\u52b1\uff1a\u7f16\u5199\u4e00\u4e2a\u89e3\u538b\u7f29\u51fd\u6570\u3002<\/p>\n

\u7531\u4e8e\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u5f3a\u5927\u529f\u80fd\uff0c\u8fd9\u662f\u4e00\u9879\u975e\u5e38\u7b80\u5355\u7684\u4efb\u52a1\u3002 python \u548c perl \u90fd\u5141\u8bb8\u66ff\u6362\u503c\u662f\u4e00\u4e2a\u51fd\u6570\u3002\u56e0\u6b64\uff0c\u6211\u6709\u4e00\u4e2a\u540d\u4e3a sc \u7684\u51fd\u6570\uff0c\u5b83\u5c06\u591a\u4e2a\u5b57\u6bcd\u8f6c\u6362\u4e3a\u6570\u5b57\u548c\u5b57\u6bcd\u3002\u4f8b\u5982\u5982\u679c\u8f93\u5165\u662faaa\uff0c\u5b83\u5c06\u8fd4\u56de3a\u3002<\/p>\n

def sc(match):\n    m = match.group(0)\n    return str(len(m)) + m[0]\n<\/pre>\n
\u7136\u540e\u5c31\u662f\u6839\u636e\u9700\u8981\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\u4e86\u3002<\/p>\n
def string_compress(s: str) -> str:\n    return re.sub(r'(([a-z])\\2+)', sc, s)\n<\/pre>\n
\u89e3\u538b\u7f29\u51fd\u6570\uff08\u4ec5\u9650python\uff09\u4ee5\u7c7b\u4f3c\u7684\u65b9\u5f0f\u5de5\u4f5c\u3002\u5b83\u91c7\u7528\u6570\u5b57\u540e\u8ddf\u5b57\u6bcd\u7684\u6a21\u5f0f\uff0c\u5e76\u5c06\u5176\u66f4\u6539\u4e3a\u91cd\u590d\u6307\u5b9a\u6b21\u6570\u7684\u5b57\u6bcd\u3002<\/p>\n
def usc(match):\n    m = match.group(0)\n    return m[-1] * int (m[:-1])\n\ndef string_decompress(s: str) -> str:\n    return re.sub(r'(\\d+[a-z])', usc, s)\n<\/pre>\n
\u4e3a\u4e86\u4ece\u547d\u4ee4\u884c\u6267\u884c\uff0c\u6211\u4f7f\u7528 argparse \u6a21\u5757\u6765\u67e5\u770b\u662f\u5426\u6307\u5b9a\u4e86 –decompress \u9009\u9879\u3002<\/p>\n
def main():\n    parser = argparse.argumentparser()\n    parser.add_argument(\"--decompress\", help=\"decompress the input\", action='store_true')\n    parser.add_argument(\"str\", help=\"the string to compress\/decompress\")\n    args = parser.parse_args()\n\n    if args.decompress:\n        result = string_decompress(args.str)\n    else:\n        result = string_compress(args.str)\n    print(result)\n<\/pre>\n
$ .\/ch-1.py abbc\na2bc\n\n$ .\/ch-1.py aaabccc\n3ab3c\n\n$ .\/ch-1.py abcc\nab2c\n\n$ .\/ch-1.py --decompress a2bc\nabbc\n\n$ .\/ch-1.py --decompress 3ab3c\naaabccc\n\n$ .\/ch-1.py --decompress ab2c\nabcc\n<\/pre>\n
\u7ed9\u4f60\u4e00\u4e2a\u6574\u6570\u6570\u7ec4\uff0c@ints\u3002<\/p>\n
\u7f16\u5199\u4e00\u4e2a\u811a\u672c\u6765\u67e5\u627e\u662f\u5426\u53ef\u4ee5\u4f7f\u7528\u7ed9\u5b9a\u6570\u7ec4 @ints \u4e2d\u7684\u68cd\u5b50\u5236\u4f5c\u4e00\u4e2a\u6b63\u65b9\u5f62\uff0c\u5176\u4e2d $ints[\u00ec] \u662f\u7b2c i \u6839\u68cd\u5b50\u7684\u957f\u5ea6\u3002<\/p>\n
\u8fd9\u4f1a\u6709\u70b9\u957f\uff0c\u6240\u4ee5\u8bf7\u7cfb\u597d\u5b89\u5168\u5e26\u3002\u6211\u68c0\u67e5\u7684\u7b2c\u4e00\u4ef6\u4e8b\u662f\u6728\u68cd\u7684\u603b\u548c\u662f\u5426\u80fd\u88ab\u56db\u6574\u9664\u3002\u5982\u679c\u4e0d\u662f\uff0c\u6ca1\u6709\u53ef\u80fd\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u6211\u53ef\u4ee5\u8fd4\u56de false<\/p>\n
\u6211\u8fd8\u53ef\u4ee5\u68c0\u67e5\u6ca1\u6709\u4e00\u6839\u68cd\u5b50\u6bd4\u4e00\u4fa7\u957f\u3002\u5982\u679c\u53d1\u751f\u8fd9\u79cd\u60c5\u51b5\uff0c\u6211\u4e5f\u4f1a\u8fd4\u56de false\u3002<\/p>\n
\u901a\u8fc7\u8fd9\u4e24\u9879\u68c0\u67e5\uff0c\u6240\u6709\u793a\u4f8b\u90fd\u4f1a\u7ed9\u51fa\u6b63\u786e\u7684\u7ed3\u679c\u3002\u7136\u800c\uff0c\u5b83\u4f1a\u9519\u8bef\u5730\u62a5\u544a 4 3 3 3 3 \u4e3a\u771f\uff0c\u800c\u5b9e\u9645\u4e0a\u5e76\u975e\u5982\u6b64\u3002<\/p>\n
 \u5c1d\u8bd5\u4e8c <\/h4>\n
\u67e5\u770b\u793a\u4f8b\u548c\u6211\u81ea\u5df1\u7684\u60f3\u6cd5\uff0c\u6211\u8ba4\u4e3a\u89e3\u51b3\u65b9\u6848\u662f\u5339\u914d\u4e00\u5bf9\u503c\u6765\u5339\u914d\u6bcf\u4e00\u4fa7\u3002\u56e0\u6b64\uff0c\u5bf9\u4e8e\u793a\u4f8b 3 4 1 4 3 1\uff0c\u6211\u4eec\u6709\u4e24\u5bf9 3 \u548c 1 \u68cd\u5b50\uff0c\u7ec4\u6210\u56db\u6839\u68cd\u5b50\u3002\u8fd9\u5c06\u89e3\u51b3 4 3 3 3 3 \u95ee\u9898\uff0c\u56e0\u4e3a 3 \u6ca1\u6709\u5339\u914d\u7684\u3002<\/p>\n
\u4f46\u662f\u5982\u679c\u68cd\u5b50\u662f 4 4 3 1 2 1 1\uff0c\u8fd9\u5c06\u4e0d\u8d77\u4f5c\u7528\uff0c\u56e0\u4e3a\u4e00\u4fa7\u4f7f\u7528\u4e09\u6839\u68cd\u5b50\uff08\u4e00\u6839 2 \u548c\u4e24\u6839 1\uff09<\/p>\n
 \u5c1d\u8bd5\u4e09 <\/h4>\n
\u6240\u4ee5\u6211\u7684\u4e0b\u4e00\u6b21\u5c1d\u8bd5\u6709\u70b9\u590d\u6742\uff0c\u6211\u8ba4\u4e3a\u8fd9\u662f\u4e00\u4e2a\u5f88\u597d\u7684\u89e3\u51b3\u65b9\u6848……\u76f4\u5230\u5b83\u4e0d\u662f\u3002\u5bf9\u4e8e\u8fd9\u6b21\u5c1d\u8bd5\uff0c\u6211\u4ece\u6700\u957f\u7684\u68cd\u5b50\u5f00\u59cb\u3002\u5982\u679c\u4e0d\u662f\u8fb9\u7684\u957f\u5ea6\uff0c\u6211\u5c31\u62ff\u5b8c\u6210\u8fb9\u6240\u9700\u7684\u4e0b\u4e00\u6839\u6700\u957f\u7684\u68cd\u5b50\uff0c\u7136\u540e\u91cd\u590d\uff0c\u76f4\u5230\u6ca1\u6709\u53ef\u80fd\u7684\u89e3\u51b3\u65b9\u6848\u3002\u4f7f\u7528\u6b64\u65b9\u6cd5\uff0c\u4ee5\u4e0b\u89e3\u51b3\u65b9\u6848\u662f\u6b63\u786e\u7684\u3002<\/p>\n
    \n
  • 4 4 3 1 2 1 1<\/li>\n
  • 9 5 4 3 3 3 3 3 3<\/li>\n
  • 9 6 3 5 4 3 3 3<\/li>\n
  • 9 6 3 5 4 3 3 2 1<\/li>\n<\/ul>\n
    \u6211\u4ee5\u4e3a\u8fd9\u5c31\u662f\u89e3\u51b3\u65b9\u6848\uff0c\u76f4\u5230\u6211\u610f\u8bc6\u5230 9 5 3 1 5 2 2 3 3 3 \u4e0d\u8d77\u4f5c\u7528\u3002\u7b2c\u4e00\u6761\u8fb9\u662f 9\uff0c\u4e0b\u4e00\u6761\u8fb9\u662f 5 3 1\uff0c\u7b2c\u4e09\u6761\u8fb9\u4f1a\u5931\u8d25\uff0c\u53ea\u6709 5 3 \u800c\u6ca1\u6709 1\u3002<\/p>\n
     \u5c1d\u8bd5\u56db <\/h4>\n
    \u6b64\u65f6\uff0c\u6211\u5f00\u59cb\u6000\u7591\u662f\u5426\u6709\u53ef\u80fd\u60f3\u51fa\u4e00\u4e2a\u4e0d\u6d89\u53ca\u66b4\u529b\u7684\u89e3\u51b3\u65b9\u6848\u3002\u6240\u4ee5\u6211\u5c31\u7761\u5728\u4e0a\u9762\uff0c\u5728\u5e73\u677f\u7535\u8111\u4e0a\u5199\u4e0b\u4e86\u5f88\u591a\u4e1c\u897f\uff08\u6211\u6b63\u5728\u5ea6\u5047\uff0c\u6240\u4ee5\u4e0d\u80fd\u4f7f\u7528\u6211\u7684\u767d\u677f\uff09\uff0c\u7136\u540e\u53c8\u7761\u5728\u4e0a\u9762\u3002\u6211\u7684\u7ed3\u8bba\u662f\u4f7f\u7528\u9012\u5f52\u51fd\u6570\u662f\u552f\u4e00\u7684\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n
    \u4e5f\u8bb8\u6211\u53ea\u662f\u60f3\u592a\u591a\u4e86\uff0c\u6216\u8005\u4e5f\u8bb8\u6709\u4e00\u4e2a\u6211\u521a\u521a\u60f3\u5230\u7684\u771f\u6b63\u7b80\u5355\u7684\u89e3\u51b3\u65b9\u6848\uff08\u5c31\u50cf\u4e0a\u5468\u7684\u60c5\u51b5\uff09\u3002<\/p>\n
     \u6700\u7ec8\u4ee3\u7801 <\/h4>\n
    \u8fd8\u5728\u8bfb\u4e66\u5417\uff1f\u5e72\u5f97\u597d:)<\/p>\n
    \u5bf9\u4e8e\u8fd9\u4e2a\u4efb\u52a1\uff0c\u6211\u6709\u4e00\u4e2a\u540d\u4e3a make_side \u7684\u9012\u5f52\u51fd\u6570\u3002\u5b83\u9700\u8981\u4e00\u4e2a\u5269\u4f59\u68cd\u68d2\u7684\u5217\u8868\uff08perl \u4e2d\u7684 arrayref\uff09\u4ee5\u53ca\u6240\u9700\u7684\u957f\u5ea6\u3002\u7136\u540e\u5b83\u4f1a\u904d\u5386\u5269\u4f59\u7684\u68cd\u5b50\uff08\u9996\u5148\u662f\u6700\u9ad8\u7684\uff09\u3002\u7136\u540e\u53d1\u751f\u4ee5\u4e0b\u4e09\u4ef6\u4e8b\u4e4b\u4e00\uff1a<\/p>\n
      \n
    • \u5982\u679c\u68cd\u5b50\u6bd4\u8981\u6c42\u7684\u957f\u5ea6\u957f\uff0c\u6211\u4f1a\u8df3\u8fc7\u5b83\u3002<\/li>\n
    • \u5982\u679c\u662f\u9700\u8981\u7684\u957f\u5ea6\uff0c\u6211\u5c31\u8fd4\u56de\u3002<\/li>\n
    • \u5982\u679c\u5b83\u5f88\u77ed\uff0c\u6211\u4f1a\u4f7f\u7528\u5b83\u5e76\u518d\u6b21\u8c03\u7528\u8be5\u51fd\u6570\u4ee5\u4f7f\u7528\u53e6\u4e00\u6839\u68cd\u5b50\u3002\u8be5\u8c03\u7528\u4f1a\u5220\u9664\u5df2\u4f7f\u7528\u7684\u68cd\u5b50\uff0c\u5e76\u6839\u636e\u5df2\u4f7f\u7528\u7684\u68cd\u5b50\u7684\u957f\u5ea6\u51cf\u5c11\u6240\u9700\u7684\u957f\u5ea6\u3002<\/li>\n<\/ul>\n
      \u8be5\u51fd\u6570\u5c06\u8fd4\u56de\u6240\u4f7f\u7528\u7684\u68cd\u5b50\u5217\u8868\uff0c\u5982\u679c\u672a\u627e\u5230\u6709\u6548\u7684\u68cd\u5b50\u7ec4\u5408\uff0c\u5219\u8fd4\u56de none \uff08perl \u4e2d\u7684 undef\uff09\u3002<\/p>\n
      def make_side(sticks: list, l: int) -> list:\n    pieces = sorted(set(sticks), reverse=true)\n    for piece in pieces:\n        if piece > l:\n            continue\n\n        if piece == l:\n            return [piece]\n\n        sticks_copy = sticks.copy()\n        sticks_copy.remove(piece)\n        result = make_side(sticks_copy, l - piece)\n        if result:\n            # we have a solution. send it upstream\n            return [piece, *result]\n\n    return false\n<\/pre>\n
      \u62fc\u56fe\u7684\u6700\u540e\u4e00\u5757\uff0c\u6211\u6267\u884c\u7b2c\u4e00\u90e8\u5206\u4e2d\u63d0\u5230\u7684\u68c0\u67e5\uff08\u603b\u548c\u53ef\u4ee5\u88ab\u56db\u6574\u9664\uff0c\u4e0d\u8d85\u8fc7\u8fb9\u957f\uff09\uff0c\u7136\u540e\u8c03\u7528\u4e0a\u9762\u7684\u51fd\u6570\u3002\u5982\u679c\u8fd4\u56de none\uff0c\u6211\u8fd4\u56de false\u3002\u5982\u679c\u6240\u6709\u7684\u68cd\u5b50\u90fd\u88ab\u4f7f\u7528\uff0c\u6211\u8fd4\u56detrue\u3002<\/p>\n
      def matchstick_square(sticks: list) -> str:\n    if sum(sticks) % 4:\n        return false\n\n    side_length = sum(sticks) \/\/ 4\n\n    if any(i > side_length for i in sticks):\n        return false\n\n    while sticks:\n        side = make_side(sticks, side_length)\n        if not side:\n            return false\n        for stick in side:\n            sticks.remove(stick)\n\n    return true\n<\/pre>\n
      $ .\/ch-2.py 1 2 2 2 1\nTrue\n\n$ .\/ch-2.py 2 2 2 4\nFalse\n\n$ .\/ch-2.py 2 2 2 2 4\nFalse\n\n$ .\/ch-2.py 3 4 1 4 3 1\nTrue\n\n$ .\/ch-2.py 9 5 3 1 5 2 2 3 3 3\nTrue\n<\/pre>\n
      \u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300a\u706b\u67f4\u68cd\u538b\u7f29\u300b\u7684\u4ecb\u7ecd\u5e94\u8be5\u8ba9\u4f60\u6536\u83b7\u591a\u591a\u4e86\u5427\uff01\u6b22\u8fce\u5927\u5bb6\u6536\u85cf\u6216\u5206\u4eab\u7ed9\u66f4\u591a\u9700\u8981\u5b66\u4e60\u7684\u670b\u53cb\u5427~\u516c\u4f17\u53f7\u4e5f\u4f1a\u53d1\u5e03\u6587\u7ae0\u76f8\u5173\u77e5\u8bc6\uff0c\u5feb\u6765\u5173\u6ce8\u5427\uff01<\/p>\n
            \u7248\u672c\u58f0\u660e \u672c\u6587\u8f6c\u8f7d\u4e8e\uff1adev.to \u5982\u6709\u4fb5\u72af\uff0c\u8bf7\u8054\u7cfb\u5220\u9664<\/p>\n","protected":false},"excerpt":{"rendered":"
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