{"id":2853,"date":"2022-03-10T19:55:54","date_gmt":"2022-03-10T11:55:54","guid":{"rendered":"http:\/\/139.9.1.231\/?p=2853"},"modified":"2022-03-10T19:55:56","modified_gmt":"2022-03-10T11:55:56","slug":"heapq_1","status":"publish","type":"post","link":"http:\/\/139.9.1.231\/index.php\/2022\/03\/10\/heapq_1\/","title":{"rendered":"\u6570\u636e\u7ed3\u6784 — \u5806"},"content":{"rendered":"\n

python\u4e2d\u76f4\u63a5\u4f7f\u7528heapq\u5efa\u7acb \u5c0f\u6839\u5806<\/p>\n\n\n\n

http:\/\/139.9.1.231\/index.php\/2022\/02\/22\/python3heapq\/<\/a><\/p>\n\n\n\n

\u5806\u7b80\u4ecb<\/h1>\n\n\n\n

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\uff08\u5c0f\u6839\uff09\u5806\u4e3b\u8981\u652f\u6301\u7684\u64cd\u4f5c\u6709\uff1a\u63d2\u5165\u4e00\u4e2a\u6570\u3001\u67e5\u8be2\u6700\u5c0f\u503c\u3001\u5220\u9664\u6700\u5c0f\u503c\u3001\u5408\u5e76\u4e24\u4e2a\u5806\u3001\u51cf\u5c0f\u4e00\u4e2a\u5143\u7d20\u7684\u503c\u3002<\/p>\n\n\n\n

\u4e00\u4e9b\u529f\u80fd\u5f3a\u5927\u7684\u5806\uff08\u53ef\u5e76\u5806\uff09\u8fd8\u80fd\uff08\u9ad8\u6548\u5730\uff09\u652f\u6301 merge \u7b49\u64cd\u4f5c\u3002<\/p>\n\n\n\n

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\"\"<\/figure>\n\n\n\n

\u4e8c\u53c9\u5806<\/h1>\n\n\n\n

\u7ed3\u6784\u00b6<\/a><\/h3>\n\n\n\n

\u4ece\u4e8c\u53c9\u5806\u7684\u7ed3\u6784\u8bf4\u8d77\uff0c\u5b83\u662f\u4e00\u68f5\u4e8c\u53c9\u6811\uff0c\u5e76\u4e14\u662f\u5b8c\u5168\u4e8c\u53c9\u6811\uff0c\u6bcf\u4e2a\u7ed3\u70b9\u4e2d\u5b58\u6709\u4e00\u4e2a\u5143\u7d20\uff08\u6216\u8005\u8bf4\uff0c\u6709\u4e2a\u6743\u503c\uff09\u3002<\/p>\n\n\n\n

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\u63d2\u5165\u64cd\u4f5c\u00b6<\/a><\/h3>\n\n\n\n

\u63d2\u5165\u64cd\u4f5c\u662f\u6307\u5411\u4e8c\u53c9\u5806\u4e2d\u63d2\u5165\u4e00\u4e2a\u5143\u7d20\uff0c\u8981\u4fdd\u8bc1\u63d2\u5165\u540e\u4e5f\u662f\u4e00\u68f5\u5b8c\u5168\u4e8c\u53c9\u6811\u3002<\/p>\n\n\n\n

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\u5982\u679c\u6700\u4e0b\u4e00\u5c42\u5df2\u6ee1\uff0c\u5c31\u65b0\u589e\u4e00\u5c42\u3002<\/p>\n\n\n\n

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\u5411\u4e0a\u8c03\u6574<\/strong>\uff1a\u5982\u679c\u8fd9\u4e2a\u7ed3\u70b9\u7684\u6743\u503c\u5927\u4e8e\u5b83\u7236\u4eb2\u7684\u6743\u503c\uff0c\u5c31\u4ea4\u6362\uff0c\u91cd\u590d\u6b64\u8fc7\u7a0b\u76f4\u5230\u4e0d\u6ee1\u8db3\u6216\u8005\u5230\u6839\u3002<\/p>\n\n\n\n

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\u5411\u4e0a\u8c03\u6574\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u662f  \u7684\u3002<\/p>\n\n\n\n

\"\u4e8c\u53c9\u5806\u7684\u63d2\u5165\u64cd\u4f5c\"\/<\/figure>\n\n\n\n

\u5220\u9664\u64cd\u4f5c\u00b6<\/a><\/h3>\n\n\n\n

\u5220\u9664\u64cd\u4f5c\u6307\u5220\u9664\u5806\u4e2d\u6700\u5927\u7684\u5143\u7d20\uff0c\u5373\u5220\u9664\u6839\u7ed3\u70b9\u3002<\/p>\n\n\n\n

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\u51cf\u5c0f\u67d0\u4e2a\u70b9\u7684\u6743\u503c\u00b6<\/a><\/h3>\n\n\n\n

\u5f88\u663e\u7136\uff0c\u76f4\u63a5\u4fee\u6539\u540e\uff0c\u5411\u4e0a\u8c03\u6574\u4e00\u6b21\u5373\u53ef<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n
\u53c2\u8003\u4ee3\u7801\uff1a\r\n\r\n\r\nvoid up(int x) {\r\n  while (x > 1 && h[x] > h[x \/ 2]) {\r\n    swap(h[x], h[x \/ 2]);\r\n    x \/= 2;\r\n  }\r\n}\r\n\r\nvoid down(int x) {\r\n  while (x * 2 <= n) {\r\n    t = x * 2;\r\n    if (t + 1 <= n && h[t + 1] > h[t]) t++;\r\n    if (h[t] <= h[x]) break;\r\n    std::swap(h[x], h[t]);\r\n    x = t;\r\n  }\r\n}<\/code><\/pre>\n\n\n\n
\u5efa\u5806\u00b6<\/a><\/p>\n\n\n\n
\u65b9\u6cd5\u4e00\uff1a\u4f7f\u7528 decreasekey\uff08\u5373\uff0c\u5411\u4e0a\u8c03\u6574\uff09\u00b6\r\n\u4ece\u6839\u5f00\u59cb\uff0c\u6309 BFS \u5e8f\u8fdb\u884c\u3002\r\n\r\n\r\nvoid build_heap_1() {\r\n  for (i = 1; i <= n; i++) up(i);\r\n}<\/code><\/pre>\n\n\n\n
\u65b9\u6cd5\u4e8c\uff1a\u4f7f\u7528\u5411\u4e0b\u8c03\u6574\u00b6\r\n\u8fd9\u65f6\u6362\u4e00\u79cd\u601d\u8def\uff0c\u4ece\u53f6\u5b50\u5f00\u59cb\uff0c\u9010\u4e2a\u5411\u4e0b\u8c03\u6574\r\n\r\n\r\nvoid build_heap_2() {\r\n  for (i = n; i >= 1; i--) down(i);\r\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
python\u4e2d\u76f4\u63a5\u4f7f\u7528heapq\u5efa\u7acb \u5c0f\u6839\u5806 http:\/\/139.9.1.231\/index.php\/202 … \u7ee7\u7eed\u9605\u8bfb\u6570\u636e\u7ed3\u6784 — \u5806<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[6,8],"tags":[],"_links":{"self":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts\/2853"}],"collection":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/comments?post=2853"}],"version-history":[{"count":11,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts\/2853\/revisions"}],"predecessor-version":[{"id":2868,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts\/2853\/revisions\/2868"}],"wp:attachment":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/media?parent=2853"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/categories?post=2853"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/tags?post=2853"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}