{"id":400,"date":"2024-04-29T16:40:57","date_gmt":"2024-04-29T08:40:57","guid":{"rendered":"https:\/\/seanxd.com\/?p=400"},"modified":"2024-04-29T16:41:00","modified_gmt":"2024-04-29T08:41:00","slug":"zerojudge-b526","status":"publish","type":"post","link":"https:\/\/seanxd.com\/zh\/zerojudge-b526\/","title":{"rendered":"ZeroJudge B526: \u5148\u5225\u7ba1\u9019\u500b\u4e86\uff0c\u4f60\u807d\u904e\u5fae\u9f13\u52f5\u55ce\uff1f"},"content":{"rendered":"\n\n\n

\u6709\u9ede\u9f13\u52f5\u53c8\u4e0d\u592a\u9f13\u52f5\uff0c\u5c31\u662f\u5fae\u9f13\u52f5\u3002\u4e00\u500b\u4eba\u53d7\u5230\u5fae\u9f13\u52f5\u5f8c\uff0c\u5982\u679c\u4ed6\u539f\u672c\u662f\u7ad9\u8457\u7684\u5c31\u6703\u8e72\u4e0b\u4f86\uff0c\u5982\u679c\u539f\u672c\u662f\u8e72\u8457\u7684\u5c31\u6703\u7ad9\u8d77\u4f86<\/strong>\u3002\u73fe\u5728\u6709\u4e00\u5806\u4eba\u6392\u6210\u4e00\u6392\uff0c\u4f60\u53ef\u4ee5\u5c0d\u5176\u4e2d\u4e00\u500b\u5340\u9593\u7684\u4eba\u9032\u884c\u5fae\u9f13\u52f5<\/strong>\uff0c\u90a3\u4e00\u5340\u9593\u7684\u4eba\u539f\u672c\u8e72\u8457\u7684\u5c31\u6703\u7ad9\u8d77\u4f86\uff0c\u539f\u672c\u7ad9\u8457\u7684\u5c31\u6703\u8e72\u4e0b\u4f86\u3002\u4e00\u958b\u59cb\u6240\u6709\u4eba\u90fd\u662f\u7ad9\u8457\u7684\uff0c\u7d93\u904e\u5e7e\u6b21\u70ba\u9f13\u52f5\u4e4b\u5f8c\uff0c\u554f\u4f60\u9084\u6709\u591a\u5c11\u4eba\u662f\u7ad9\u8457\u7684\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>
\u7b2c\u4e00\u884c\u6709\u4e00\u500b\u6574\u6578 N (N <= 2,000,000,000)\uff0c\u4ee3\u8868\u6709 N \u500b\u4eba\u7531\u5de6\u81f3\u53f3\u6392\u6210\u4e00\u6392\uff0c\u7531\u6700\u5de6\u908a\u7684\u4eba\u958b\u59cb\u7de8\u865f\u5206\u5225\u70ba 1, 2, 3, \u2026, N\u3002
\u7b2c\u4e8c\u884c\u6709\u4e00\u6574\u6578 M (M <= 100000)\uff0c\u63a5\u4e0b\u4f86\u6703\u6709 M \u6b21\u5fae\u9f13\u52f5\u3002
\u63a5\u4e0b\u4f86 M \u884c\u6bcf\u884c\u6709\u5169\u500b\u6574\u6578 Li<\/sub> \u548c Ri<\/sub>\u3002\u8868\u793a\u5c0d Li<\/sub> \u81f3 Ri<\/sub> \u9019\u9589\u5340\u9593 (\u5305\u542b\u5169\u7aef) \u7684\u4eba\u4f5c\u5fae\u9f13\u52f5\u3002<\/td>		\u8acb\u8f38\u51fa\u6700\u5f8c\u6709\u591a\u5c11\u4eba\u7ad9\u8457\u3002<\/td><\/tr>
5
3
1 3
3 5
1 5<\/td>		4<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

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

\u4f7f\u7528 Map \u4f86\u5b58\u6bcf\u4e00\u6b21\u5fae\u9f13\u52f5\u7684\u7bc4\u570d<\/strong>\uff0c\u56e0\u70ba\u53ea\u8981\u5fae\u9f13\u52f5\u5169\u6b21\u5c31\u6703\u8b8a\u6210\u7ad9\u8457\u7b49\u65bc\u6c92\u6709\u5fae\u9f13\u52f5<\/strong>\u3002<\/p>\n\n\n\n

\u5c07 R+1 \u4e4b\u5f8c\u5c31\u53ef\u4ee5\u77e5\u9053 R-L \u662f\u88ab\u5fae\u9f13\u52f5\u7684\u4eba\u6578\uff0c\u5c07 L \u548c R \u653e\u5230 Map \u4e2d\uff0c\u5982\u679c\u5df2\u7d93\u6709\u8cc7\u6599\u4e86\u5c31\u4ee3\u8868\u6709\u91cd\u8907\u5fae\u9f13\u52f5\u7684\u60c5\u6cc1<\/strong>\uff0c\u6240\u4ee5\u5c07\u5df2\u7d93\u51fa\u73fe\u904e\u7684Map\u503c\u505a\u522a\u9664<\/strong>\uff0c\u7136\u5f8c\u6c92\u6709\u5b58\u904e\u7684\u8cc7\u6599\u5b58\u5230Map\u4e2d\u3002<\/p>\n\n\n\n

\u6700\u5f8c\u5c07 Map \u8f49\u63db\u70ba Vector<Pair<int, int>><\/strong> \u7136\u5f8c\u5169\u5169\u4e00\u7d44\u9032\u884c R-L \u7684\u52d5\u4f5c\u4e26\u5c07\u7b54\u6848\u76f8\u52a0\u5373\u53ef\u3002<\/p>\n\n\n\n

\u7bc4\u4f8b\u7a0b\u5f0f\u78bc\uff0dZeroJudge B526: \u5148\u5225\u7ba1\u9019\u500b\u4e86\uff0c\u4f60\u807d\u904e\u5fae\u9f13\u52f5\u55ce\uff1f<\/a><\/h3>\n\n\n\n
#include <iostream>\n#include <map>\n#include <vector>\nusing namespace std;\n\nmap<int, int>MAP;\n\nvoid change(int N)\n{\n    if (MAP[N] == 0)\n    {\n        MAP[N]++;\n        return;\n    }\n    MAP.erase(N);\n}\n\nint main() {\n    cin.sync_with_stdio(0);\n    cin.tie(0);\n    int N, M;\n    cin >> N >> M;\n    for (int i = 0; i<M; i++)\n    {\n        int a, b;\n        cin >> a >> b;\n        b++;\n        change(a);\n        change(b);\n    }\n    vector<pair<int, int>>ans;\n    copy(MAP.begin(), MAP.end(), back_inserter(ans));\n    int sum = 0;\n    for (int i = 0; i<ans.size(); i++)\n    {\n        sum += ans[i+1].first - ans[i].first;\n        i++;\n    }\n    cout << N-sum << "\\n";\n}\n\n\/\/ZeroJudge B526\n\/\/Dr. SeanXD<\/code><\/pre><\/div>\n","protected":false},"excerpt":{"rendered":"
\u6709\u9ede\u9f13\u52f5\u53c8\u4e0d\u592a\u9f13\u52f5\uff0c\u5c31\u662f\u5fae\u9f13\u52f5\u3002\u4e00\u500b\u4eba\u53d7\u5230\u5fae\u9f13\u52f5\u5f8c\uff0c\u5982\u679c\u4ed6\u539f\u672c\u662f\u7ad9\u8457\u7684\u5c31\u6703\u8e72\u4e0b\u4f86\uff0c\u5982\u679c\u539f\u672c\u662f\u8e72\u8457\u7684\u5c31\u6703\u7ad9\u8d77\u4f86\u3002 […]<\/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":[14,23,20,8,9],"class_list":["post-400","post","type-post","status-publish","format-standard","hentry","category-zerojudge-","tag-map","tag-pair","tag-20","tag-8","tag-9"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/seanxd.com\/zh\/wp-json\/wp\/v2\/posts\/400","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=400"}],"version-history":[{"count":1,"href":"https:\/\/seanxd.com\/zh\/wp-json\/wp\/v2\/posts\/400\/revisions"}],"predecessor-version":[{"id":401,"href":"https:\/\/seanxd.com\/zh\/wp-json\/wp\/v2\/posts\/400\/revisions\/401"}],"wp:attachment":[{"href":"https:\/\/seanxd.com\/zh\/wp-json\/wp\/v2\/media?parent=400"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/seanxd.com\/zh\/wp-json\/wp\/v2\/categories?post=400"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/seanxd.com\/zh\/wp-json\/wp\/v2\/tags?post=400"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}