{"id":204121,"date":"2025-05-29T13:33:11","date_gmt":"2025-05-29T05:33:11","guid":{"rendered":"https:\/\/server.hk\/cnblog\/204121\/"},"modified":"2025-05-29T13:33:11","modified_gmt":"2025-05-29T05:33:11","slug":"%e5%8f%8c%e5%8d%a2%e6%81%a9","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/204121\/","title":{"rendered":"\u53cc\u5362\u6069"},"content":{"rendered":"

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

\u53cc\u5362\u6069<\/h1>\n

\u6587\u7ae0<\/span>\u4e0d\u77e5\u9053\u5927\u5bb6\u662f\u5426\u719f\u6089\uff1f\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u300a\u53cc\u5362\u6069\u300b<\/span>\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4f1a\u8bb2\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u5728\u770b\u5b8c\u672c\u7bc7\u6587\u7ae0\u540e\uff0c\u6709\u66f4\u597d\u7684\u5efa\u8bae\u6216\u8005\u53d1\u73b0\u54ea\u91cc\u6709\u95ee\u9898\uff0c\u5e0c\u671b\u5927\u5bb6\u90fd\u80fd\u79ef\u6781\u8bc4\u8bba\u6307\u51fa\uff0c\u8c22\u8c22\uff01\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u52a0\u6cb9\u8fdb\u6b65\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\u6bcf\u5468\u4e24\u6b21\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

\u7ed9\u4f60\u4e00\u4e2a\u6574\u6570\u6570\u7ec4\uff0c@ints\u3002<\/p>\n

\u7f16\u5199\u4e00\u4e2a\u811a\u672c\u6765\u67e5\u627e\u662f\u5426\u5b58\u5728\u4e24\u4e2a\u7d22\u5f15 $i \u548c $j \u4f7f\u5f97\uff1a<\/p>\n

    \n
  1. $i != $j<\/li>\n
  2. 0 <= ($i, $j) < \u6807\u91cf@ints<\/li>\n
  3. $ints[$i] == 2 * $ints[$j]<\/li>\n<\/ol>\n

    \u8fd9\u770b\u8d77\u6765\u76f8\u5bf9\u7b80\u5355\uff0c\u4f46\u6709\u4e00\u4e2a\u5de8\u5927\u7684\u95ee\u9898\u5e0c\u671b\u666e\u534e\u6c38\u9053\u56e2\u961f\u7684\u5176\u4ed6\u6210\u5458\u4e5f\u6ce8\u610f\u5230\u3002\u5bf9\u4e8e\u6b64\u4efb\u52a1\uff0c\u6211\u5faa\u73af\u904d\u5386\u5217\u8868\u5e76\u67e5\u770b\u662f\u5426\u5b58\u5728\u4e24\u500d\u4e8e\u5176\u503c\u7684\u503c\u3002<\/p>\n

    \u4f46\u662f\uff0c\u5982\u679c\u503c\u4e3a\u201c0\u201d\uff08\u56e0\u6b64 0 \u00d7 2 = 0\uff09\uff0c\u6211\u9700\u8981\u68c0\u67e5\u5217\u8868\u4e2d\u662f\u5426\u81f3\u5c11\u6709\u4e24\u4e2a\u96f6\u3002<\/p>\n

    def double_exists(ints: list) -> bool:\n\n    for i in ints:\n        if i * 2 in ints:\n            if i != 0 or ints.count(0) > 1:\n                return true\n\n    return false\n<\/pre>\n
    $ .\/ch-1.py 6 2 3 3\ntrue\n\n$ .\/ch-1.py 3 1 4 13\nfalse\n\n$ .\/ch-1.py 2 1 4 2\ntrue\n\n$ .\/ch-1.py 1 3 0\nfalse\n\n$ .\/ch-1.py 1 0 3 0\ntrue\n<\/pre>\n
    \u7ed9\u4f60\u4e00\u4e2a\u5b57\u7b26\u4e32 $str \uff0c\u5176\u4e2d\u5305\u542b\u6570\u5b57\uff08\u53ef\u80fd\u8fd8\u6709\u5176\u4ed6\u53ef\u4ee5\u5ffd\u7565\u7684\u5b57\u7b26\uff09\u3002\u6700\u540e\u4e00\u4f4d\u6570\u5b57\u662f\u6709\u6548\u8d1f\u8f7d\uff1b\u5206\u5f00\u8003\u8651\u3002\u4ece\u53f3\u6570\u8d77\uff0c\u5c06\u5269\u4f59\u6570\u5b57\u7684\u7b2c\u4e00\u4e2a\u3001\u7b2c\u4e09\u4e2a\u7b49\u7684\u503c\u52a0\u500d\u3002<\/p>\n
    \u5bf9\u4e8e\u73b0\u5728\u5927\u4e8e 9 \u7684\u6bcf\u4e2a\u503c\uff0c\u5c06\u5176\u6570\u5b57\u76f8\u52a0\u3002<\/p>\n
    \u6b63\u786e\u7684\u6821\u9a8c\u4f4d\u662f\u6dfb\u52a0\u5230\u6240\u6709\u503c\u7684\u603b\u548c\u4e2d\uff0c\u5c06\u4f7f\u603b mod 10 \u4e3a\u96f6\u3002<\/p>\n
    \u5f53\u4e14\u4ec5\u5f53\u6709\u6548\u8d1f\u8f7d\u7b49\u4e8e\u6b63\u786e\u7684\u6821\u9a8c\u4f4d\u65f6\u8fd4\u56de true\u3002<\/p>\n
    \u6211\u901a\u8fc7\u4ece\u5b57\u7b26\u4e32\u4e2d\u5220\u9664\u975e\u6570\u5b57\u5b57\u7b26\u6765\u5f00\u59cb\u6b64\u4efb\u52a1\uff0c\u5e76\u5c06\u53cd\u8f6c\u7684\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u6574\u6570\u5217\u8868\u3002<\/p>\n
    \u7136\u540e\uff0c\u6211\u4f7f\u7528\u63d0\u4f9b\u7684\u516c\u5f0f\uff0c\u4ea4\u66ff\u6dfb\u52a0\u8981\u8ba1\u6570\u7684\u503c\u6216\u5c06\u5176\u4e58\u4ee5 2 \u5e76\u9664\u53bb 9\u3002\u5982\u679c\u7ed3\u679c\u8ba1\u6570\u53ef\u88ab 10 \u6574\u9664\uff0c\u6211\u8fd4\u56de true\uff0c\u5426\u5219\u8fd4\u56de false\u3002<\/p>\n
    def luhn_algorithm(s: str) -> bool:\n    s = re.sub('[^0-9]', '', s)\n    ints = [int(n) for n in s[::-1]]\n\n    count = 0\n    for pos, i in enumerate(ints):\n        if pos % 2 == 1:\n            i *= 2\n            if i > 9:\n                i -= 9\n        count += i\n    return count % 10 == 0\n<\/pre>\n
    $ .\/ch-2.py  17893729974\ntrue\n\n$ .\/ch-2.py  \"4137 8947 1175 5904\"\ntrue\n\n$ .\/ch-2.py \"4137 8974 1175 5904\"\nfalse\n<\/pre>\n
    \u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301\uff01\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\u3002<\/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":"
    \u53cc\u5362\u6069 \u6587\u7ae0\u4e0d\u77e5\u9053\u5927\u5bb6\u662f\u5426\u719f\u6089\uff1f...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-204121","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204121","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=204121"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204121\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=204121"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=204121"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=204121"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}