{"id":2630,"date":"2020-01-01T19:31:51","date_gmt":"2020-01-01T11:31:51","guid":{"rendered":"http:\/\/www.sniper97.cn\/?p=2630"},"modified":"2020-01-01T19:31:51","modified_gmt":"2020-01-01T11:31:51","slug":"%e3%80%90%e7%ae%97%e6%b3%95%e5%88%86%e6%9e%90%e4%b8%8e%e8%ae%be%e8%ae%a1%e3%80%91%e5%9f%ba%e6%9c%ac%e7%9a%84%e5%9b%be%e7%ae%97%e6%b3%95","status":"publish","type":"post","link":"http:\/\/www.sniper97.cn\/index.php\/note\/introduction_to_algorithms\/2630\/","title":{"rendered":"\u3010\u7b97\u6cd5\u5bfc\u8bba\u3011\u57fa\u672c\u7684\u56fe\u7b97\u6cd5"},"content":{"rendered":"\n
\"\"<\/figure>\n\n\n

1.\u56fe\u7684\u8868\u793a<\/h2>\n\n\n

\u5bf9\u4e8e\u56feG=(V,E)\uff0c\u6211\u4eec\u53ef\u4ee5\u7528\u4e24\u79cd\u6807\u51c6\u65b9\u6cd5\u8868\u793a\u3002\u4e00\u79cd\u662f\u90bb\u63a5\u94fe\u8868\uff0c\u4e00\u79cd\u662f\u90bb\u63a5\u77e9\u9635\u3002<\/p>\n\n\n

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

\u5982\u4e0b\u56fe\u5206\u522b\u5c31\u662f\u56fe\uff0c\u56fe\u7684\u90bb\u63a5\u94fe\u8868\u8868\u793a\uff0c\u56fe\u7684\u90bb\u63a5\u77e9\u9635\u8868\u793a\u3002<\/p>\n\n\n

\u5bf9\u4e8e\u7a20\u5bc6\u56fe\uff0c\u6211\u4eec\u4e00\u822c\u4f7f\u7528\u90bb\u63a5\u77e9\u9635\u6765\u8868\u793a\uff0c\u5bf9\u4e8e\u7a00\u758f\u56fe\uff0c\u6211\u4eec\u4e00\u822c\u4f7f\u7528\u90bb\u63a5\u94fe\u8868\u6765\u8868\u793a\u3002<\/p>\n\n\n

2.\u5e7f\u5ea6\u4f18\u5148\u641c\u7d22<\/h2>\n\n\n

\u5e7f\u5ea6\u4f18\u5148\u641c\u7d22\u662f\u6700\u7b80\u5355\u7684\u56fe\u641c\u7d22\u7b97\u6cd5\u4e4b\u4e00\uff0c\u4e5f\u662f\u8bb8\u591a\u56fe\u7b97\u6cd5\u7684\u539f\u578b\u3002<\/p>\n\n\n

\u5e7f\u5ea6\u4f18\u5148\u904d\u5386\u987e\u540d\u601d\u4e49\u5c31\u662f\u5c3d\u53ef\u80fd\u5e7f\u7684\u904d\u5386\uff0c\u5148\u904d\u5386\u5f53\u524d\u8282\u70b9\u7684\u6240\u6709\u5b69\u5b50\u8282\u70b9\uff0c\u518d\u5411\u4e0b\u904d\u5386\u76f4\u5230\u904d\u5386\u5b8c\u5168\u6574\u4e2a\u6811\u3002<\/p>\n\n\n

\"\"<\/figure><\/div>\n\n\n
\"\"<\/figure><\/div>\n\n\n
def bfs(self, graph, init_idx, flag=None):\n    \"\"\"\n    \u5e7f\u5ea6\u4f18\u5148\u904d\u5386\n    <\/em>:param<\/em><\/strong> graph:\n    <\/em>:return<\/em><\/strong>:\n    \"\"\"\n    <\/em>result = []\n    # \u7b2c\u4e00\u6b21\u8fd0\u884c\u7684\u6570\u636e\u521d\u59cb\u5316\n    if flag is None:\n        flag = [0 for _ in range(len(graph))]\n        flag[init_idx - 1] = 1\n        result = [init_idx]\n    temp_list = []\n    for j in range(len(flag)):\n        if graph[init_idx - 1][j] == 1 and flag[j] == 0:\n            result.append(j + 1)\n            temp_list.append(j)\n            flag[j] = 1\n    # \u9012\u5f52\u5e7f\u641c\n    for i in range(len(temp_list)):\n        result.extend(self.bfs(graph, temp_list[i] + 1, flag))\n    return result<\/pre>\n\n\n
\u6700\u77ed\u8def\u5f84<\/h3>\n\n\n
\u5e7f\u5ea6\u4f18\u5148\u904d\u5386\u4e5f\u53ef\u4ee5\u7528\u6765\u627e\u6700\u77ed\u8ddd\u79bb\uff0c\u56e0\u4e3a\u662f\u5c42\u7ea7\u904d\u5386\uff0c\u5982\u679c\u4ece\u6839\u904d\u5386\uff0c\u5230\u76ee\u6807\u8282\u70b9\u7ecf\u8fc7\u51e0\u5c42\uff0c\u5219\u6700\u77ed\u8def\u5c31\u4e3a\u591a\u5c11\u3002<\/p>\n\n\n
3.\u6df1\u5ea6\u4f18\u5148\u641c\u7d22<\/h2>\n\n\n
\u6df1\u5ea6\u4f18\u5148\u904d\u5386\u662f\u4ece\u56fe\u7684\u4e00\u6761\u8fb9\u5165\u624b\uff0c\u4e00\u76f4\u5411\u4e0b\u76f4\u81f3\u6ca1\u529e\u6cd5\u518d\u904d\u5386\u4e3a\u6b62\u3002<\/p>\n\n\n
\"\"<\/figure><\/div>\n\n\n
\"\"<\/figure><\/div>\n\n\n
\u4ee3\u7801\uff1a<\/p>\n\n\n
def dfs(self, graph, init_idx, flag=None):
    \"\"\"
<\/em>    <\/em>\u6df1\u5ea6\u4f18\u5148\u904d\u5386
<\/em>    <\/em>:param<\/em><\/strong> graph:
<\/em>    <\/em>:param<\/em><\/strong> init_idx:
<\/em>    <\/em>:param<\/em><\/strong> flag:
<\/em>    <\/em>:return<\/em><\/strong>:
<\/em>    \"\"\"
<\/em>    <\/em>result = [init_idx]
    if flag is None:
        flag = [0 for _ in range(len(graph))]
    for i in range(len(graph)):
        if graph[init_idx - 1][i] == 1 and flag[i] == 0:
            flag[i] = 1
            result.extend(self.dfs(graph, i + 1, flag))
    return result<\/pre>\n\n\n
4.\u62d3\u6251\u6392\u5e8f<\/h2>\n\n\n
\u5bf9\u4e8e\u4e00\u4e2a\u6709\u5411\u65e0\u73af\u56fe\u6765\u8bf4\uff0c\u5176\u62d3\u6251\u6392\u5e8f<\/strong>\u662fG\u4e2d\u6240\u6709\u8282\u70b9\u7684\u4e00\u79cd\u7ebf\u6027\u6b21\u5e8f\u3002<\/p>\n\n\n
\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u5982\u679c\u662f\u4e00\u4e9b\u5f85\u5b8c\u6210\u4e8b\u9879\uff0c\u90a3\u4e48\u62d3\u6251\u6392\u5e8f\u5c31\u662f\u4e00\u4e2a\u4f60\u5b8c\u6210\u8be5\u4e8b\u9879\u7684\u987a\u5e8f\u3002<\/p>\n\n\n
\u6bd4\u5982\u5982\u4e0b\u5b66\u4e60\u8def\u7ebf\uff1a<\/p>\n\n\n
\"\"<\/figure>\n\n\n
\u6211\u4eec\u53ef\u4ee5\u6574\u7406\u51fa5\u79cd\u5b66\u4e60\u8def\u7ebf\uff0c\u800c\u8fd9\u4e94\u6761\u8def\u7ebf\u5c31\u662f\u4e0a\u56fe\u7684\u62d3\u6251\u6392\u5e8f\u3002<\/p>\n\n\n
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1.\u56fe\u7684\u8868\u793a \u5bf9\u4e8e\u56feG=(V,E)\uff0c\u6211\u4eec\u53ef\u4ee5\u7528\u4e24\u79cd\u6807\u51c6\u65b9\u6cd5\u8868\u793a\u3002\u4e00\u79cd\u662f\u90bb\u63a5\u94fe\u8868\uff0c\u4e00\u79cd\u662f\u90bb\u63a5\u77e9\u9635\u3002 \u5982 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[11],"tags":[],"views":4700,"_links":{"self":[{"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/posts\/2630"}],"collection":[{"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/comments?post=2630"}],"version-history":[{"count":0,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/posts\/2630\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/media?parent=2630"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/categories?post=2630"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/tags?post=2630"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}