{"id":212,"date":"2024-04-26T20:33:01","date_gmt":"2024-04-26T12:33:01","guid":{"rendered":"https:\/\/seanxd.com\/?p=212"},"modified":"2024-04-26T20:33:03","modified_gmt":"2024-04-26T12:33:03","slug":"zerojudge-k862","status":"publish","type":"post","link":"https:\/\/seanxd.com\/zh\/zerojudge-k862\/","title":{"rendered":"ZeroJudge K862: \u8f29\u4efd\u6bd4\u8f03"},"content":{"rendered":"\n\n\n

\u6587\u6587\u7684\u8001\u5bb6\u662f\u500b\u5927\u5bb6\u65cf\uff0c\u6bcf\u6b21\u904e\u5e74\u56de\u8001\u5bb6\u6642\u7e3d\u662f\u641e\u4e0d\u6e05\u695a\u8f29\u4efd\u95dc\u4fc2\uff0c\u5e38\u5e38\u628a\u9577\u8f29\u7576\u5e73\u8f29\uff0c\u8b1b\u8a71\u6c92\u5927\u6c92\u5c0f\u3002\u65bc\u662f\u7238\u7238\u62ff\u51fa\u5bb6\u8b5c\u4f86\uff0c\u597d\u597d\u5730\u8ddf\u6587\u6587\u8907\u7fd2\u4e00\u6b21\u5bb6\u65cf\u6210\u54e1\u4e4b\u9593\u7684\u8f29\u4efd\u95dc\u4fc2\u3002<\/p>\n\n\n\n

\u73fe\u5728\uff0c\u5f9e\u9019\u4efd\u5bb6\u8b5c\u4e2d\u53d6\u51fa\u5169\u500b\u4eba\u7684\u540d\u5b57\uff0c\u8acb\u4f60\u6bd4\u8f03\u4ed6\u5011\u7684\u8f29\u4efd\u95dc\u4fc2<\/strong>\u3002<\/p>\n\n\n\n

\u7bc4\u4f8b\u6e2c\u8cc7<\/h2>\n\n\n\n
\u7bc4\u4f8b\u8f38\u5165<\/th>\u7bc4\u4f8b\u8f38\u51fa<\/th><\/tr><\/thead>
\u8f38\u5165\u7684\u7b2c\u4e00\u884c\u542b\u6709\u4e00\u500b\u6574\u6578 N (1 \u2264 N \u2264 100)\uff0c\u4ee3\u8868\u9019\u4efd\u5bb6\u8b5c\u4e2d\u5305\u542b\u4e86\u5e7e\u500b\u89aa\u5b50\u95dc\u4fc2\u3002
\u63a5\u4e0b\u4f86\u6709 N \u884c\uff0c\u6bcf\u884c\u6709\u5169\u500b\u540d\u5b57 a \u548c b\uff0c\u4ee3\u8868 a \u662f b \u7684\u5b69\u5b50\u3002
\u6700\u5f8c\u6709\u4e00\u884c\u67e5\u8a62\uff0c\u542b\u6709\u5169\u500b\u540d\u5b57 p \u548c q<\/strong>\uff0c\u4ee3\u8868\u6211\u5011\u5e0c\u671b\u77e5\u9053 p \u8ddf q \u4e4b\u9593\u7684\u8f29\u4efd\u95dc\u4fc2\u3002
\u4fdd\u8b49\u65cf\u8b5c\u4e2d\u7684\u6bcf\u4e00\u500b\u4eba\u90fd\u53ef\u4ee5\u8ffd\u6eaf\u5230\u4e00\u500b\u5171\u540c\u7684\u7956\u5148\u3002<\/strong><\/td>		\u8f38\u51fa\u4e00\u500b\u6574\u6578\uff0cp \u548c q \u540c\u8f29\u6642\uff0c\u8f38\u51fa 0\u3002p \u662f q \u7684\u9577\u8f29\u7684\u8a71\uff0c\u8f38\u51fa\u4e00\u500b\u6b63\u6574\u6578\uff0c\u4ee3\u8868 p \u662f q \u4e0a\u9762\u5e7e\u4ee3\u7684\u9577\u8f29\u3002p \u662f q \u7684\u665a\u8f29\u7684\u8a71\uff0c\u8f38\u51fa\u4e00\u500b\u8ca0\u6574\u6578\uff0c\u4ee3\u8868 p \u662f q \u4e0b\u9762\u5e7e\u4ee3\u7684\u665a\u8f29\u3002<\/td><\/tr>
3
Jacob Isaac
Isaac Abraham
Ishmael Abraham
Jacob Ishmael<\/strong><\/td>		-1<\/td><\/tr>
3
A ABC
B ABC
C ABC
A C<\/strong><\/td>		0<\/td><\/tr>
4
me dad
dad grand-dad
son me
grand-son son
grand-dad grand-son<\/strong><\/td>		4<\/td><\/tr><\/tbody><\/table>
ZeroJudge K862 \u7bc4\u4f8b\u6e2c\u8cc7<\/figcaption><\/figure>\n\n\n\n

\u89e3\u984c\u601d\u8def<\/h2>\n\n\n\n

\u672c\u984c\u985e\u4f3c\u65bc\u6a39\u72c0\u5716\u7684\u6982\u5ff5<\/strong>\uff0c\u53ef\u4ee5\u5275\u5efa\u4e00\u500b Struct<\/strong>\uff0c\u88e1\u9762\u5b58\u540d\u5b57\u3001\u9577\u8f29\u3001\u548c\u665a\u8f29<\/strong>\u3002\u7136\u5f8c\u518d\u5229\u7528 Map<\/strong> \u4f86\u5c07\u540d\u5b57\u7576\u6210Key<\/strong>\u628a\u9019\u4e9b Struct<\/strong> \u5b58\u9032\u4f86\u3002\u6700\u5f8c\u518d\u4f7f\u7528 BFS<\/strong> \u7684\u65b9\u5f0f\u5f9e\u8981\u627e\u7684\u540d\u5b57\u958b\u59cb\u5f80\u4e0a\u548c\u5f80\u4e0b\u627e\uff0c\u8981\u6ce8\u610f\u7684\u662f\uff0c\u9700\u8981\u518d\u4f7f\u7528\u4e00\u500b Map<\/strong> \u4f86\u7d00\u9304\u76ee\u524d\u9019\u500b\u540d\u5b57\u662f\u5426\u6709\u88ab\u8d70\u904e\u4e86\u4ee5\u514d\u9032\u884c\u91cd\u8907\u7684\u904b\u7b97<\/strong>\u3002<\/p>\n\n\n\n

\u7bc4\u4f8b\u7a0b\u5f0f\u78bc\uff0dZeroJudge K862: \u8f29\u4efd\u6bd4\u8f03<\/a><\/h3>\n\n\n\n
#include <iostream>\n#include <map>\n#include <vector>\nusing namespace std;\n\nstruct node\n{\n    vector<node*>up;\n    vector<node*>down;\n    string name;\n    int val = 0;\n};\n\nmap<string, node*>MAP;\nmap<string, int>walk;\nstring start, target;\nint ans;\n\nvoid BFS(vector<string>start)\n{\n    if (start.size() == 0) return;\n    vector<string>newStart;\n    for (int i = 0; i<start.size(); i++)\n    {\n        string name = start[i];\n        walk[name] = 1;\n        if (name == target)\n        {\n            ans = MAP[name]->val;\n            return;\n        }\n        if (MAP[name]->up.size() != 0)\n        {\n            for (int j = 0; j<MAP[name]->up.size(); j++)\n            {\n                string fn = MAP[name]->up[j]->name;\n                if (walk[fn] == 0) {\n                    MAP[fn]->val = MAP[name]->val - 1;\n                    newStart.push_back(fn);\n                }\n            }\n        }\n        if (MAP[name]->down.size() != 0)\n        {\n            for (int j = 0; j<MAP[name]->down.size(); j++)\n            {\n                string fn = MAP[name]->down[j]->name;\n                if (walk[fn] == 0) {\n                    MAP[fn]->val = MAP[name]->val + 1;\n                    newStart.push_back(fn);\n                }\n            }\n        }\n    }\n    BFS(newStart);\n}\n\nint main() {\n    cin.sync_with_stdio(0);\n    cin.tie(0);\n    int N;\n    cin >> N;\n    for (int i = 0; i<N; i++)\n    {\n        string a, b;\n        cin >> a >> b;\n        if (MAP[a] == nullptr)\n        {\n            node* tmp = new node();\n            tmp->name = a;\n            MAP[a] = tmp;\n        }\n        if (MAP[b] == nullptr)\n        {\n            node* tmp = new node();\n            tmp->name = b;\n            MAP[b] = tmp;\n        }\n        MAP[a]->up.push_back(MAP[b]);\n        MAP[b]->down.push_back(MAP[a]);\n    }\n    cin >> start >> target;\n    vector<string>v;\n    v.push_back(start);\n    BFS(v);\n    cout << ans << "\\n";\n}\n\n\/\/ZeroJudge K862\n\/\/Dr. SeanXD<\/code><\/pre><\/div>\n","protected":false},"excerpt":{"rendered":"
\u6587\u6587\u7684\u8001\u5bb6\u662f\u500b\u5927\u5bb6\u65cf\uff0c\u6bcf\u6b21\u904e\u5e74\u56de\u8001\u5bb6\u6642\u7e3d\u662f\u641e\u4e0d\u6e05\u695a\u8f29\u4efd\u95dc\u4fc2\uff0c\u5e38\u5e38\u628a\u9577\u8f29\u7576\u5e73\u8f29\uff0c\u8b1b\u8a71\u6c92\u5927\u6c92\u5c0f\u3002\u65bc\u662f\u7238\u7238\u62ff\u51fa\u5bb6\u8b5c\u4f86 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","footnotes":""},"categories":[6],"tags":[30,14,27,20,8,11,9],"class_list":["post-212","post","type-post","status-publish","format-standard","hentry","category-6","tag-bfs","tag-map","tag-struct","tag-20","tag-8","tag-11","tag-9"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/seanxd.com\/zh\/wp-json\/wp\/v2\/posts\/212","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/seanxd.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/seanxd.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/seanxd.com\/zh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/seanxd.com\/zh\/wp-json\/wp\/v2\/comments?post=212"}],"version-history":[{"count":2,"href":"https:\/\/seanxd.com\/zh\/wp-json\/wp\/v2\/posts\/212\/revisions"}],"predecessor-version":[{"id":214,"href":"https:\/\/seanxd.com\/zh\/wp-json\/wp\/v2\/posts\/212\/revisions\/214"}],"wp:attachment":[{"href":"https:\/\/seanxd.com\/zh\/wp-json\/wp\/v2\/media?parent=212"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/seanxd.com\/zh\/wp-json\/wp\/v2\/categories?post=212"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/seanxd.com\/zh\/wp-json\/wp\/v2\/tags?post=212"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}