“`” <\/p>\n
1\u3001\u62fc\u5199\u7ea0\u9519\u662f\u57fa\u4e8e\u7f16\u8f91\u8ddd\u79bb\u6765\u5b9e\u73b0\uff1b\u7f16\u8f91\u8ddd\u79bb\u662f\u4e00\u79cd\u6807\u51c6\u7684\u65b9\u6cd5\uff0c\u5b83\u7528\u6765\u8868\u793a\u7ecf\u8fc7\u63d2\u5165\u3001\u5220\u9664\u548c\u66ff\u6362\u64cd\u4f5c\u4ece\u4e00\u4e2a\u5b57\u7b26\u4e32\u8f6c\u6362\u5230\u53e6\u5916\u4e00\u4e2a\u5b57\u7b26\u4e32\u7684\u6700\u5c0f\u64cd\u4f5c\u6b65\u6570\uff1b<\/p>\n
\u00a0<\/p>\n
2\u3001\u7f16\u8f91\u8ddd\u79bb\u7684\u8ba1\u7b97\u8fc7\u7a0b\uff1a\u6bd4\u5982\u8981\u8ba1\u7b97 batyu \u548c beauty \u7684\u7f16\u8f91\u8ddd\u79bb\uff0c\u5148\u521b\u5efa\u4e00\u4e2a7\u00d78 \u7684\u8868\uff08batyu \u957f\u5ea6\u4e3a 5\uff0ccoffee \u957f\u5ea6\u4e3a 6\uff0c\u5404\u52a0 2\uff09\uff0c\u63a5\u7740\uff0c\u5728\u5982\u4e0b\u4f4d\u7f6e\u586b\u5165\u9ed1\u8272\u6570\u5b57\u3002\u5176\u4ed6\u683c\u7684\u8ba1\u7b97\u8fc7\u7a0b\u662f\u53d6\u4ee5\u4e0b\u4e09\u4e2a\u503c\u7684\u6700\u5c0f\u503c\uff1a<\/p>\n
\u00a0<\/p>\n
\u5982\u679c\u6700\u4e0a\u65b9\u7684\u5b57\u7b26\u7b49\u4e8e\u6700\u5de6\u65b9\u7684\u5b57\u7b26\uff0c\u5219\u4e3a\u5de6\u4e0a\u65b9\u7684\u6570\u5b57\u3002\u5426\u5219\u4e3a\u5de6\u4e0a\u65b9\u7684\u6570\u5b57+1\u3002\uff08\u5bf9\u4e8e 3,3 \u6765\u8bf4\u4e3a 0\uff09<\/p>\n
\u5de6\u65b9\u6570\u5b57+1\uff08\u5bf9\u4e8e 3,3 \u683c\u6765\u8bf4\u4e3a 2\uff09<\/p>\n
\u4e0a\u65b9\u6570\u5b57+1\uff08\u5bf9\u4e8e 3,3 \u683c\u6765\u8bf4\u4e3a 2\uff09<\/p>\n
\u00a0<\/p>\n
\u6700\u7ec8\u53d6\u53f3\u4e0b\u89d2\u7684\u503c\u5373\u4e3a\u7f16\u8f91\u8ddd\u79bb\u7684\u503c 3\u3002<\/p>\n
\u00a0<\/p>\n
<img alt=""img"" referrerpolicy=""no-referrer"" src=""http:\/\/res.mianshigee.com\/upload\/article\/20200307\/v2-1f5084b94e47d417b3cebd615ef04647_1440w.jpg""><\/p>\n
\u00a0<\/p>\n
\u5bf9\u4e8e\u62fc\u5199\u7ea0\u9519\uff0c\u6211\u4eec\u8003\u8651\u6784\u9020\u4e00\u4e2a\u5ea6\u91cf\u7a7a\u95f4\uff08Metric Space\uff09\uff0c\u8be5\u7a7a\u95f4\u5185\u4efb\u4f55\u5173<\/p>\n
\u7cfb\u6ee1\u8db3\u4ee5\u4e0b\u4e09\u6761\u57fa\u672c\u6761\u4ef6\uff1a<\/p>\n
\u00a0<\/p>\n
d(x,y) = 0 — \u5047\u5982 x \u4e0e y \u7684\u8ddd\u79bb\u4e3a 0\uff0c\u5219 x=y<\/p>\n
d(x,y) = d(y,x) — x \u5230 y \u7684\u8ddd\u79bb\u7b49\u540c\u4e8e y \u5230 x \u7684\u8ddd\u79bb<\/p>\n
d(x,y) + d(y,z) >= d(x,z) — \u4e09\u89d2\u4e0d\u7b49\u5f0f<\/p>\n
\u00a0<\/p>\n
1\u3001\u6839\u636e\u4e09\u89d2\u4e0d\u7b49\u5f0f\uff0c\u5219\u6ee1\u8db3\u4e0e query \u8ddd\u79bb\u5728 n \u8303\u56f4\u5185\u7684\u53e6\u4e00\u4e2a\u5b57\u7b26\u8f6c B\uff0c\u5176\u4e0e A<\/p>\n
\u7684\u8ddd\u79bb\u6700\u5927\u4e3a d+n\uff0c\u6700\u5c0f\u4e3a d-n\u3002<\/p>\n
\u00a0<\/p>\n
2\u3001BK \u6811\u7684\u6784\u9020\u5c31\u8fc7\u7a0b\u5982\u4e0b\uff1a\u6bcf\u4e2a\u8282\u70b9\u6709\u4efb\u610f\u4e2a\u5b50\u8282\u70b9\uff0c\u6bcf\u6761\u8fb9\u6709\u4e2a\u503c\u8868\u793a\u7f16\u8f91\u8ddd\u79bb\u3002\u6240\u6709\u5b50\u8282\u70b9\u5230\u7236\u8282\u70b9\u7684\u8fb9\u4e0a\u6807\u6ce8 n \u8868\u793a\u7f16\u8f91\u8ddd\u79bb\u6070\u597d\u4e3a n\u3002\u6bd4\u5982\uff0c\u6211\u4eec\u6709\u68f5\u6811\u7236\u8282\u70b9\u662f\u201dbook\u201d\u548c\u4e24\u4e2a\u5b50\u8282\u70b9\u201dcake\u201d\u548c\u201dbooks\u201d\uff0c\u201dbook\u201d\u5230\u201dbooks\u201d\u7684\u8fb9\u6807\u53f7 1\uff0c\u201dbook\u201d\u5230\u201dcake\u201d\u7684\u8fb9\u4e0a\u6807\u53f7 4\u3002\u4ece\u5b57\u5178\u91cc\u6784\u9020\u597d\u6811\u540e\uff0c\u65e0\u8bba\u4f55<\/p>\n
\u65f6\u4f60\u60f3\u63d2\u5165\u65b0\u5355\u8bcd\u65f6\uff0c\u8ba1\u7b97\u8be5\u5355\u8bcd\u4e0e\u6839\u8282\u70b9\u7684\u7f16\u8f91\u8ddd\u79bb\uff0c\u5e76\u4e14\u67e5\u627e\u6570\u503c\u4e3ad(neweord, root)\u7684\u8fb9\u3002\u9012\u5f52\u5f97\u4e0e\u5404\u5b50\u8282\u70b9\u8fdb\u884c\u6bd4\u8f83\uff0c\u76f4\u5230\u6ca1\u6709\u5b50\u8282\u70b9\uff0c\u4f60\u5c31\u53ef\u4ee5\u521b\u5efa\u65b0\u7684\u5b50\u8282\u70b9\u5e76\u5c06\u65b0\u5355\u8bcd\u4fdd\u5b58\u5728\u90a3\u3002\u6bd4\u5982\uff0c\u63d2\u5165\u201dboo\u201d\u5230\u521a\u624d\u4e0a\u8ff0\u4f8b\u5b50\u7684\u6811\u4e2d\uff0c\u6211\u4eec\u5148\u68c0\u67e5\u6839\u8282\u70b9\uff0c\u67e5\u627e d(\u201cbook\u201d, \u201cboo\u201d) = 1 \u7684\u8fb9\uff0c\u7136\u540e\u68c0\u67e5\u6807\u53f7\u4e3a1 \u7684\u8fb9\u7684\u5b50\u8282\u70b9\uff0c\u5f97\u5230\u5355\u8bcd\u201dbooks\u201d\u3002\u6211\u4eec\u518d\u8ba1\u7b97\u8ddd\u79bb d(\u201cbooks\u201d, \u201cboo\u201d)=2\uff0c\u5219\u5c06\u65b0\u5355\u8bcd\u63d2\u5728\u201dbooks\u201d\u4e4b\u540e\uff0c\u8fb9\u6807\u53f7\u4e3a 2\u3002<\/p>\n
\u00a0<\/p>\n
3\u3001\u67e5\u8be2\u76f8\u4f3c\u8bcd\u5982\u4e0b\uff1a\u8ba1\u7b97\u5355\u8bcd\u4e0e\u6839\u8282\u70b9\u7684\u7f16\u8f91\u8ddd\u79bb d\uff0c\u7136\u540e\u9012\u5f52\u67e5\u627e\u6bcf\u4e2a\u5b50\u8282\u70b9\u6807\u53f7\u4e3a d-n \u5230 d+n\uff08\u5305\u542b\uff09\u7684\u8fb9\u3002\u5047\u5982\u88ab\u68c0\u67e5\u7684\u8282\u70b9\u4e0e\u641c\u7d22\u5355\u8bcd\u7684\u8ddd\u79bb d \u5c0f\u4e8e n\uff0c\u5219\u8fd4\u56de\u8be5\u8282\u70b9\u5e76\u7ee7\u7eed\u67e5\u8be2\u3002\u6bd4\u5982\u8f93\u5165 cape \u4e14\u6700\u5927\u5bb9\u5fcd\u8ddd\u79bb\u4e3a 1\uff0c\u5219\u5148\u8ba1\u7b97\u548c\u6839\u7684\u7f16\u8f91\u8ddd\u79bb d(\u201cbook\u201d, \u201ccape\u201d)=4\uff0c\u7136\u540e\u63a5\u7740\u627e\u548c\u6839\u8282\u70b9\u4e4b\u95f4\u7f16\u8f91\u8ddd\u79bb\u4e3a 3 \u52305 \u7684\uff0c\u8fd9<\/p>\n
\u4e2a\u5c31\u627e\u5230\u4e86 cake \u8fd9\u4e2a\u8282\u70b9\uff0c\u8ba1\u7b97 d(\u201ccake\u201d, \u201ccape\u201d)=1\uff0c\u6ee1\u8db3\u6761\u4ef6\u6240\u4ee5\u8fd4\u56de <strong>cake<\/strong>\uff0c\u7136\u540e\u518d\u627e\u548c cake \u8282\u70b9\u7f16\u8f91\u8ddd\u79bb\u662f 0 \u5230 2 \u7684\uff0c\u5206\u522b\u627e\u5230 cape \u548ccart \u8282\u70b9\uff0c\u8fd9\u6837\u5c31\u5f97\u5230 <strong>cape<\/strong> \u8fd9\u4e2a\u6ee1\u8db3\u6761\u4ef6\u7684\u7ed3\u679c\u3002<\/p>\n
\u00a0<\/p>\n
\u00a0<\/p>\n
<img alt=""img"" referrerpolicy=""no-referrer"" src=""http:\/\/res.mianshigee.com\/upload\/article\/20200307\/v2-d5426155b3c3c0a7e49123954f96e347_1440w.jpg""><\/p>\n
<pre><code> "“`
\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
“`” 1\u3001\u62fc\u5199\u7ea0\u9519\u662f\u57fa\u4e8e\u7f16\u8f91\u8ddd\u79bb\u6765\u5b9e\u73b0\uff1b\u7f16\u8f91\u8ddd\u79bb\u662f\u4e00\u79cd\u6807\u51c6\u7684\u65b9\u6cd5\uff0c\u5b83\u7528 […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-47809","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/47809","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=47809"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/47809\/revisions"}],"predecessor-version":[{"id":47810,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/47809\/revisions\/47810"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=47809"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=47809"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=47809"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}