{"id":506,"date":"2024-05-25T09:00:00","date_gmt":"2024-05-25T01:00:00","guid":{"rendered":"https:\/\/seanxd.com\/?p=506"},"modified":"2024-05-05T11:31:39","modified_gmt":"2024-05-05T03:31:39","slug":"zerojudge-b563","status":"publish","type":"post","link":"https:\/\/seanxd.com\/zh\/zerojudge-b563\/","title":{"rendered":"ZeroJudge B563: \u9b54\u6cd5\u5b78\u6821\u4ea4\u63db\u751f\u554f\u984c"},"content":{"rendered":"\n\n\n

\u3008\u54c8\u5229\u6ce2\u7279\uff0d\u706b\u76c3\u7684\u8003\u9a57\u300b\u4e2d\uff0c\u5728\u970d\u683c\u83ef\u8332\u6240\u8209\u8fa6\u7684\u4e09\u5deb\u9b25\u6cd5\u5927\u8cfd\u7d50\u675f\u4e4b\u5f8c\uff0c\u4e0d\u53ea\u662f\u6ce2\u5df4\u6d1e\u9b54\u6cd5\u5973\u6821\u3001\u5fb7\u59c6\u862d\u9b54\u6cd5\u8ecd\u6821\u9019\u96e8\u6240\u9b54\u6cd5\u5b78\u6821\uff0c\u9084\u6709\u4f86\u81ea\u4e16\u754c\u5404\u5730\u7684\u9b54\u6cd5\u5b78\u6821\u90fd\u9678\u7e8c\u767c\u51fd\u5c0d\u970d\u683c\u83ef\u8332\u63d0\u51fa\u4ea4\u63db\u5b78\u751f\u7684\u8981\u6c42\u3002\u6821\u9577\u963f\u4e0d\u601d\u2022\u9127\u4e0d\u5229\u591a\u4e5f\u8a8d\u70ba\u5982\u679c\u672c\u6821\u5b78\u751f\u4e5f\u53ef\u4ee5\u5230\u5176\u4ed6\u9b54\u6cd5\u5b78\u6821\u9032\u884c\u5b78\u7fd2\uff0c\u9019\u5c07\u80fd\u5920\u4fc3\u9032\u570b\u969b\u9593\u7684\u9b54\u6cd5\u4ea4\u6d41\u3002\u56e0\u6b64\uff0c\u963f\u4e0d\u601d\u2022\u9127\u4e0d\u5229\u591a\u6c7a\u5b9a\u8207\u5404\u6821\u6821\u9577\u7d44\u6210\u4e00\u500b\u5c08\u6848\u5c0f\u7d44\u4f86\u4e3b\u8fa6\u9019\u6b21\u7684\u4ea4\u63db\u5b78\u751f\u8a08\u756b\uff0c\u4f46\u7531\u65bc\u662f\u7b2c\u4e00\u6b21\u4e3b\u8fa6\uff0c\u9127\u4e0d\u5229\u591a\u4e0d\u60f3\u958b\u653e\u592a\u591a\u7684\u4ea4\u63db\u751f\u7684\u540d\u984d\uff0c\u70ba\u4e86\u7c21\u55ae\u8d77\u898b\uff0c\u898f\u5b9a\u6bcf\u4e00\u500b\u60f3\u5f9e A \u5b78\u6821\u63db\u5230 B \u5b78\u6821\u7684\u5b78\u751f\u5fc5\u9808\u4e5f\u8981\u6709\u4e00\u500b\u60f3\u5f9e B \u5b78\u6821\u4ea4\u63db\u5230 A \u5b78\u6821\u7684\u5b78\u751f\uff0c\u9019\u6a23\u5c08\u6848\u5c0f\u7d44\u624d\u80fd\u540c\u610f\u4ed6\u5011\u7684\u4ea4\u63db\uff0c\u6574\u500b\u4ea4\u63db\u5b78\u751f\u8a08\u756b\u624d\u7b97\u662f\u6210\u529f\u3002\u5305\u542b\u970d\u683c\u83ef\u8332\u5728\u5167\uff0c\u5404\u5730\u7684\u5b78\u751f\u90fd\u975e\u5e38\u8e34\u8e8d\u7684\u7533\u8acb\uff0c\u73fe\u5728\uff0c\u5c08\u6848\u5c0f\u7d44\u4ea4\u4ed8\u4f60\u4e00\u500b\u4efb\u52d9\uff0c\u5c31\u662f\u5beb\u4e00\u500b\u7a0b\u5f0f\u4f86\u8a08\u7b97\u7b26\u5408\u898f\u5b9a\u7684\u4ea4\u63db\u5b78\u751f\u6848\u4ef6\u914d\u5c0d\u6578\u91cf\u3002<\/p>\n\n\n\n

\u7bc4\u4f8b\u6e2c\u8cc7<\/h2>\n\n\n\n
\u7bc4\u4f8b\u8f38\u51fa<\/th>\u7bc4\u4f8b\u8f38\u51fa<\/th><\/tr><\/thead>
EOF<\/strong> \u8f38\u5165\uff0c\u6bcf\u7d44\u6e2c\u8a66\u8cc7\u6599\u7684\u7b2c\u4e00\u5217\u542b\u6709 1 \u500b\u6b63\u6574\u6578 N (1 \u2264 N \u2264 100)\uff0c\u4ee3\u8868\u63d0\u51fa\u7533\u8acb\u7684\u5b78\u751f\u500b\u6578\u3002\u63a5\u4e0b\u4f86\u7684 N \u5217\uff0c\u6bcf\u4e00\u5217\u70ba\u4e00\u500b\u5b78\u751f\u7684\u7533\u8acb\u6848 (\u4e00\u500b\u5b78\u751f\u53ea\u80fd\u6709\u4e00\u500b\u7533\u8acb\u6848\uff09\uff0c\u5305\u542b\u5169\u500b\u4e0d\u540c\u7684\u6b63\u6574\u6578 A \u548c B\uff0c\u7528\u7a7a\u683c\u5b57\u5143\u505a\u9593\u9694\uff0c\u4ee3\u8868\u8a72\u5b78\u751f\u60f3\u5f9e A \u5b78\u6821\u4ea4\u63db\u5230 B \u5b78\u6821\uff0c\u9019\u88e1 A \u8ddf B \u5169\u500b\u6578\u5b57\u4e0d\u6703\u4e00\u6a23\u3002<\/td>\u5c0d\u65bc\u6bcf\u7d44\u6e2c\u8a66\u8cc7\u6599\uff0c\u8acb\u8f38\u51fa\u7b26\u5408\u898f\u5b9a\u7684\u4ea4\u63db\u5b78\u751f\u6848\u4ef6\u914d\u5c0d\u6578\u91cf\u3002\u8209\u4f8b\u4f86\u8aaa\uff0c\u5982\u679c A \u5b78\u6821\u7684\u67d0\u4e00\u5b78\u751f\u8207 B \u5b78\u6821\u7684\u67d0\u4e00\u5b78\u751f\u4e92\u76f8\u4ea4\u63db\uff0c\u5247\u7b26\u5408\u898f\u5b9a\u7684\u6848\u4ef6\u6578\u91cf\u5c31\u589e\u52a0\u4e86\u4e00\u5c0d (\u898b\u8f38\u51fa\u7bc4\u4f8b\uff09\u3002\u82e5\u6c92\u6709\u4efb\u4f55\u7b26\u5408\u898f\u5b9a\u7684\u6848\u4ef6\u6578\u91cf\uff0c\u8acb\u8f38\u51fa 0\u3002<\/td><\/tr>
8
1 2
100 200
200 100
57 2
2 57
1 2
2 1
2 1
3
1 2
2 3
3 1<\/td>		4
0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

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

\u4f7f\u7528 Pair<int, int> \u7684\u65b9\u5f0f\u6536 A \u548c B\uff0c\u5982\u679c\u8981\u914d\u5c0d\u6210\u529f\u7684\u8a71\u5c31\u9700\u8981\u5169\u5c0d\u4e00\u6a23\u7684\u6578\u5b57\u4f46\u662f\u4e0d\u540c\u6392\u5217\u65b9\u5f0f\u3002<\/p>\n\n\n\n

\u5ba3\u544a\u4e00\u500b Map<pair<int, int>, int>\uff0c\u5982\u679c A > B\uff0c\u5247\u5224\u65b7 Map[Pair] \u4e2d\u7684\u8cc7\u6599\u662f\u5426 > 0\uff0c\u5982\u679c > 0 \u7684\u8a71\uff0c\u4ee3\u8868\u88e1\u9762\u6709\u53e6\u5916\u4e00\u908a\u53ef\u4ee5\u914d\u5c0d\u7684\u4eba\uff0c\u5c07\u7b54\u6848 +1\uff0c\u5c07 A \u548c B swap \u4e4b\u5f8c\u5c07 Map[Pair]–\u3002\u5982\u679c A < B\uff0c\u5247\u5224\u65b7 Map[Pair] \u662f\u5426 < 0\uff0c\u5982\u679c < 0 \u7684\u8a71\uff0c\u4ee3\u8868\u88e1\u9762\u6709\u53e6\u5916\u4e00\u908a\u53ef\u4ee5\u914d\u5c0d\u7684\u4eba\uff0c\u5c07\u7b54\u6848 +1\uff0c\u4e26\u5c07 Map[Pair]++\u3002<\/p>\n\n\n\n

\u7bc4\u4f8b\u7a0b\u5f0f\u78bc\uff0dZeroJudge B563: \u9b54\u6cd5\u5b78\u6821\u4ea4\u63db\u751f\u554f\u984c<\/a><\/h3>\n\n\n\n
#include <iostream>\n#include <map>\nusing namespace std;\n\nint main() {\n    cin.sync_with_stdio(0);\n    cin.tie(0);\n    int N;\n    while (cin >> N)\n    {\n        map<pair<int, int>, int>MAP;\n        int ans = 0;\n        for (int i = 0; i<N; i++)\n        {\n            pair<int, int>school;\n            cin >> school.first >> school.second;\n            if (school.first > school.second)\n            {\n                swap(school.first, school.second);\n                if (MAP[school] > 0) ans++;\n                MAP[school]--;\n            }\n            else\n            {\n                if (MAP[school] < 0) ans++;\n                MAP[school]++;\n            }\n        }\n        cout << ans << "\\n";\n    }\n}\n\n\/\/ZeroJudge B563\n\/\/Dr. SeanXD<\/code><\/pre><\/div>\n","protected":false},"excerpt":{"rendered":"
\u3008\u54c8\u5229\u6ce2\u7279\uff0d\u706b\u76c3\u7684\u8003\u9a57\u300b\u4e2d\uff0c\u5728\u970d\u683c\u83ef\u8332\u6240\u8209\u8fa6\u7684\u4e09\u5deb\u9b25\u6cd5\u5927\u8cfd\u7d50\u675f\u4e4b\u5f8c\uff0c\u4e0d\u53ea\u662f\u6ce2\u5df4\u6d1e\u9b54\u6cd5\u5973\u6821\u3001\u5fb7\u59c6\u862d\u9b54\u6cd5\u8ecd\u6821\u9019\u96e8\u6240 […]<\/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":[29],"tags":[14,23,8,9],"class_list":["post-506","post","type-post","status-publish","format-standard","hentry","category-zerojudge-","tag-map","tag-pair","tag-8","tag-9"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/seanxd.com\/zh\/wp-json\/wp\/v2\/posts\/506","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=506"}],"version-history":[{"count":2,"href":"https:\/\/seanxd.com\/zh\/wp-json\/wp\/v2\/posts\/506\/revisions"}],"predecessor-version":[{"id":979,"href":"https:\/\/seanxd.com\/zh\/wp-json\/wp\/v2\/posts\/506\/revisions\/979"}],"wp:attachment":[{"href":"https:\/\/seanxd.com\/zh\/wp-json\/wp\/v2\/media?parent=506"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/seanxd.com\/zh\/wp-json\/wp\/v2\/categories?post=506"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/seanxd.com\/zh\/wp-json\/wp\/v2\/tags?post=506"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}