{"id":84,"date":"2026-05-16T10:34:32","date_gmt":"2026-05-16T02:34:32","guid":{"rendered":"https:\/\/huxiaole.cloud\/?p=84"},"modified":"2026-05-20T18:28:23","modified_gmt":"2026-05-20T10:28:23","slug":"2026-4-19vp2025%e5%9b%9b%e5%b7%9dccpc%e7%9c%81%e8%b5%9b%e5%8f%8a%e8%b5%9b%e5%90%8e%e8%a1%a5%e9%a2%98","status":"publish","type":"post","link":"https:\/\/huxiaole.cloud\/index.php\/2026\/05\/16\/2026-4-19vp2025%e5%9b%9b%e5%b7%9dccpc%e7%9c%81%e8%b5%9b%e5%8f%8a%e8%b5%9b%e5%90%8e%e8%a1%a5%e9%a2%98\/","title":{"rendered":"2026.4.19VP2025\u56db\u5dddCCPC\u7701\u8d5b\u53ca\u8d5b\u540e\u8865\u9898"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u8d5b\u65f6\u53ea\u5199\u4e86\u4e09\u9053\u9898\uff0c\u7b2c\u56db\u9053\u601d\u8def\u9519\u4e86\u4ece\u800c\u6539\u4e0d\u51fa\u6765\u7b54\u6848\u3002<br>\u4f46\u662f\u6211\u7684\u6c34\u5e73\u4e5f\u5c31\u5230\u8fd9\u91cc\u4e86\uff0c\u5c5e\u4e8e\u6b63\u5e38\u53d1\u6325\u3002<br>\u540e\u7eed\u8865\u9898\u53d1\u73b0\u9898\u7684\u8d28\u91cf\u90fd\u975e\u5e38\u9ad8\uff0c\u6bcf\u4e00\u9053\u90fd\u80fd\u5b66\u5230\u4e00\u4e9b\u4e1c\u897f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uff08\u8d5b\u540e\u53d1\u73b0\u662f hdu \u51fa\u7684\u9898\uff0c\u8fd8\u5f97\u662f\u4f60 hdu\uff09<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">H. Hututu\uff08\u7b7e\u5230\uff0c\u6784\u9020\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u601d\u8def<\/strong><br>\u4e4b\u524d\u5728 codeforces \u89c1\u8fc7\u4e00\u9053\u7c7b\u4f3c\u7684\u9898\u55b5\uff08\u53ea\u4e0d\u8fc7\u4ed6\u548c\u5947\u5076\u6027\u6709\u5173\uff0c\u6bd4\u8fd9\u4e00\u9053\u96be\uff09\uff0c\u5982\u679c\u628a\u80fd\u62b5\u8fbe\u7684\u70b9\u5316\u6210\u4e00\u5f20\u56fe\uff0c\u6ce8\u610f\u5230\uff0c\u5982\u679c\u8d77\u70b9\u7684\u5341\u5b57\u662f\u4e0d\u80fd\u4e00\u6b65\u5230\u8fbe\u7684\uff0c\u6211\u4eec\u81f3\u5c11\u9700\u8981\u4e24\u6b65\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u590d\u6742\u5ea6\u5206\u6790<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u65f6\u95f4\u590d\u6742\u5ea6\uff1a$O(1)$\u3002<\/li>\n\n\n\n<li>\u7a7a\u95f4\u590d\u6742\u5ea6\uff1a$O(1)$\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4ee3\u7801<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include&lt;bits\/stdc++.h&gt;\n#define fi first\n#define se second\nusing namespace std;\nusing ll = long long;\ntemplate &lt;class T&gt;\nvoid debug(T x) {cout &lt;&lt; x &lt;&lt; endl;} \ntemplate &lt;class T&gt;\nvoid debug(vector&lt;T&gt; a) {for(int i = 0; i &lt; a.size(); ++i) cout &lt;&lt; a&#91;i] &lt;&lt; \" \"; cout &lt;&lt; endl;}\nvoid debug(string s) {cout &lt;&lt; s &lt;&lt; endl;}\n\nvoid solve() {\n    int sx,sy,ex,ey;\n    cin&gt;&gt;sx&gt;&gt;sy&gt;&gt;ex&gt;&gt;ey;\n\n    int dx=abs(ex-sx),dy=abs(ey-sy);\n    if(dx==0&amp;&amp;dy==0){\n        cout&lt;&lt;0&lt;&lt;endl;\n        return;\n    }\n\n    int ans=max(dx+1,dy+1)\/2;\n    if(dx==0&amp;&amp;ans&lt;2)ans++;\n    if(dy==0&amp;&amp;ans&lt;2)ans++;\n\n    cout&lt;&lt;ans&lt;&lt;endl;\n}\n\nint main() {\n    ios::sync_with_stdio(false);\n    cin.tie(nullptr);\n    cout.tie(nullptr);\n    \n    int t = 1;\n    cin &gt;&gt; t;\n    while(t--) solve();\n\n    return 0;\n}\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">I. Essentially Different Suffixes\uff08\u5b57\u7b26\u4e32\uff0c\u6784\u9020\uff0c\u6570\u5b66\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u601d\u8def<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8d5b\u65f6\u7528\u54c8\u5e0c\u53bb\u5b58\u50a8\u540e\u7f00\u7ed3\u679c\u7a7a\u95f4\u590d\u6742\u5ea6\u8fc7\u9ad8\uff0c\u6539\u7528\u65b9\u6cd5\u5c06\u6bcf\u4e2a\u5b57\u7b26\u4e32 reverse\uff0c\u63a5\u7740\u8fdb\u884c\u6392\u5e8f\u8ba9\u76f8\u540c\u524d\u7f00\u7684\u5b57\u7b26\u80fd\u591f\u5728\u4e00\u5757\uff0c\u63a5\u7740\u53bb\u7edf\u8ba1\u7b2c1\u4f4d,\u7b2c2\u4f4d,\u7b2c3\u4f4d&#8230;\u5206\u522b\u6709\u591a\u5c11\u4e2a\u4e0d\u540c\u7684\u6570\uff0c\u53ef\u4ee5\u7528\u54c8\u5e0c\u4ee3\u8868\u6709\u6ca1\u6709\u548c\u4ed6\u76f8\u540c\u7684\u6570\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u590d\u6742\u5ea6\u5206\u6790<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u65f6\u95f4\u590d\u6742\u5ea6\uff1a$O(\\sum|S_i| \\log \\sum|S_i|)$\uff0c\u74f6\u9888\u5728\u4e8e\u5b57\u7b26\u4e32\u53cd\u8f6c\u540e\u7684\u6392\u5e8f\u3002<br><\/li>\n\n\n\n<li>\u7a7a\u95f4\u590d\u6742\u5ea6\uff1a$O(\\sum|S_i|)$\u3002<br><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4ee3\u7801<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include&lt;bits\/stdc++.h&gt;\n#define fi first\n#define se second\nusing namespace std;\nusing ll = long long;\ntemplate &lt;class T&gt;\nvoid debug(T x) {cout &lt;&lt; x &lt;&lt; endl;} \ntemplate &lt;class T&gt;\nvoid debug(vector&lt;T&gt; a) {for(int i = 0; i &lt; a.size(); ++i) cout &lt;&lt; a&#91;i] &lt;&lt; \" \"; cout &lt;&lt; endl;}\nvoid debug(string s) {cout &lt;&lt; s &lt;&lt; endl;}\n\nvoid solve() {\n    int n;\n    cin &gt;&gt; n;\n    string s;\n    vector&lt;string&gt; ss(n);\n    for(int i = 0; i &lt; n; ++i) {\n        cin&gt;&gt;s;\n        reverse(s.begin(),s.end());\n        ss&#91;i]=s;\n    }\n\n    sort(ss.begin(),ss.end());\n    vector&lt;bool&gt; vis(n,true);\n    int ans=0;\n    int curr=1;\n\n    for(int j=0;j&lt;(int)s.size();j++){\n        for(int i=1;i&lt;n;i++){\n            if(vis&#91;i]&amp;&amp;ss&#91;i]&#91;j]!=ss&#91;i-1]&#91;j]){\n                vis&#91;i]=false;\n                curr++;\n            }\n        }\n        ans+=curr;\n    }\n    cout &lt;&lt; ans &lt;&lt; endl;\n}\n\nint main() {\n    ios::sync_with_stdio(false);\n    cin.tie(nullptr);\n    cout.tie(nullptr);\n    \n    int t = 1;\n    \/\/ cin &gt;&gt; t;\n    while(t--) solve();\n\n    return 0;\n}\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">F. Inversion Pairs\uff08\u6570\u5b66\uff0c\u6784\u9020\uff0c\u5b57\u7b26\u4e32\uff0c\u8d2a\u5fc3\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u601d\u8def<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0d\u96be\u53d1\u73b0\u5bf9\u4e8e\u6bcf\u4e00\u4f4d\uff0c\u5982\u679c\u662f 0 \u80fd\u5bf9\u4ed6\u4ea7\u751f\u8d21\u732e\u7684\u662f\u524d\u8005\u4e3a 1 \u7684\u6570\u5b57\uff0c\u5982\u679c\u662f 1 \u80fd\u5bf9\u4ed6\u4ea7\u751f\u8d21\u732e\u7684\u662f\u540e\u8005\u662f 0 \u7684\u6570\u5b57\uff0c\u90a3\u4e48\u6211\u4eec\u53ef\u4ee5\u505a\u51fa\u4e00\u4e2a\u5224\u5b9a\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u524d\u8005\u8981\u5c3d\u53ef\u80fd\u662f\u4e00\uff0c\u540e\u8005\u8981\u5c3d\u53ef\u80fd\u662f\u96f6\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u90a3\u4e48\u95ee\u9898\u5c31\u662f\u4ece\u54ea\u91cc\u5f00\u59cb\u540e\u9762\u662f\u96f6\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u524d\u540e\u7f00\u5206\u522b\u7ef4\u62a4\u4ed6 0 \u6216\u8005 1 \u7684\u8d21\u732e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u590d\u6742\u5ea6\u5206\u6790<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u65f6\u95f4\u590d\u6742\u5ea6\uff1a$O(n)$\uff0c\u6b63\u53cd\u4e24\u904d\u904d\u5386\u9884\u5904\u7406\u524d\u540e\u7f00\uff0c\u518d\u904d\u5386\u4e00\u6b21\u7edf\u8ba1\u7b54\u6848\u3002<br><\/li>\n\n\n\n<li>\u7a7a\u95f4\u590d\u6742\u5ea6\uff1a$O(n)$\uff0c\u7528\u4e8e\u7ef4\u62a4\u524d\u540e\u7f00\u6570\u7ec4\u3002<br><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4ee3\u7801<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include&lt;bits\/stdc++.h&gt;\n#define fi first\n#define se second\n#define int long long\nusing namespace std;\nusing ll = long long;\ntemplate &lt;class T&gt;\nvoid debug(T x) {cout &lt;&lt; x &lt;&lt; endl;} \ntemplate &lt;class T&gt;\nvoid debug(vector&lt;T&gt; a) {for(int i = 0; i &lt; a.size(); ++i) cout &lt;&lt; a&#91;i] &lt;&lt; \" \"; cout &lt;&lt; endl;}\nvoid debug(string s) {cout &lt;&lt; s &lt;&lt; endl;}\n\nvoid solve() {\n    int n;cin&gt;&gt;n;\n    string s;cin&gt;&gt;s;\n\n    vector&lt;int&gt; pre(n+1,0);\n    vector&lt;int&gt; suf(n+1,0);\n\n    for(int i=n-2;i&gt;=0;i--){\n        suf&#91;i]+=suf&#91;i+1]+((s&#91;i+1]=='0'||s&#91;i+1]=='?')?1:0);\n    }\n\n    int ans=0;\n    for(int i=0;i&lt;n;i++){\n        if(i&gt;=1)pre&#91;i]=pre&#91;i-1]+(s&#91;i-1]=='1'?1:0);\n\n        if(pre&#91;i]&lt;suf&#91;i]){\n            if(s&#91;i]=='?'){\n                s&#91;i]='1';\n            }\n        }else{\n            if(s&#91;i]=='?'){\n                s&#91;i]='0';\n            }\n        }\n    }\n\n    for(int i=0;i&lt;n;i++){\n        if(s&#91;i]=='0'){\n            ans+=pre&#91;i];\n        }\n    }\n    cout&lt;&lt;ans&lt;&lt;endl;\n}\n\nsigned main() {\n    ios::sync_with_stdio(false);\n    cin.tie(nullptr);\n    cout.tie(nullptr);\n    \n    int t = 1;\n    cin &gt;&gt; t;\n    while(t--) solve();\n\n    return 0;\n}\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">J. Sichuan Provincial Contest\uff08\u6811\u5f62DP\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u601d\u8def<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uff08\u8d5b\u65f6\u7531\u4e8e\u53ea\u8003\u8651\u4e86\u987a\u5e8f\u56e0\u6b64\u6574\u4e2a\u4ee3\u7801\u4ece\u6811\u5f62DP\u7684\u601d\u8def\u5230\u4e86\u9519\u8bef\u7684DFS\u601d\u8def\uff0cDFS\u53ea\u6709\u6b63\u5e8f\uff0c\u6ca1\u6709\u5012\u5e8f\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u51d1\u9f50\u5b57\u7b26\u4e32\u5b83\u8bf4\u7684\u662f\u5305\u62ec\u987a\u7740\u987a\u5e8f\u548c\u9006\u7740\u987a\u5e8f\u8fdb\u800c\u60f3\u5230\u7528\u6811\u5f62 DP \u7684\u65b9\u6cd5\uff0c\u6bcf\u6b21\u8bb0\u5f55\u4ed6\u5f53\u524d\u80fd\u51d1\u5230\u7b2c\u51e0\u4e2a target\uff0c\u5c06\u524d\u540e\u7684 dp \u7ec4\u5408\u8d77\u6765\u5e76\u52a0\u5165\u8d21\u732e\uff08\u5c06\u5b57\u7b26\u4e32\u5206\u4e3a\u4e24\u6bb5\uff0c\u5206\u522b\u7531\u524d\u7f00\u548c\u540e\u7f00\u7ec4\u6210\uff09\uff0c\u63a5\u7740\u5c06\u65b0\u7684\u4e00\u4f4d\u52a0\u5165\u5e76\u7ef4\u62a4\u524d\u540e\u7684 dp \u5f53\u4e2d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u590d\u6742\u5ea6\u5206\u6790<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u65f6\u95f4\u590d\u6742\u5ea6\uff1a$O(n)$\uff0c\u6811\u5f62 DP \u4e00\u6b21 DFS \u5373\u53ef\u5b8c\u6210\uff0c\u72b6\u6001\u8f6c\u79fb\u5e38\u6570\u6781\u5c0f\u3002<br><\/li>\n\n\n\n<li>\u7a7a\u95f4\u590d\u6742\u5ea6\uff1a$O(n)$\u3002<br><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4ee3\u7801<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include&lt;bits\/stdc++.h&gt;\n#define int long long\nusing namespace std;\nusing PII=pair&lt;int,int&gt; ;\n\nconst int MAXN=1000010;\n\nint n;string s;\nint ans=0;\nvector&lt;int&gt; adj&#91;MAXN];\nstring target=\" SCCPC\";\n\nint dp_up&#91;MAXN]&#91;6];\nint dp_down&#91;MAXN]&#91;6];\n\nvoid dfs(int u,int fa){\n\tfor(int i=1;i&lt;=5;i++){\n\t\tdp_up&#91;u]&#91;i]=0;\n\t\tdp_down&#91;u]&#91;i]=0;\n\t}\n\t\n\tif(s&#91;u]==target&#91;1])dp_up&#91;u]&#91;1]=1;\n\tif(s&#91;u]==target&#91;5])dp_down&#91;u]&#91;5]=1;\n\t\n\tfor(auto v:adj&#91;u]){\n\t\tif(v==fa)continue;\n\t\tdfs(v,u);\n\t\t\n\t\tfor(int k=1;k&lt;4;k++){\n\t\t\tans+=dp_up&#91;u]&#91;k]*dp_down&#91;v]&#91;k+1];\n\t\t\tans+=dp_up&#91;v]&#91;k]*dp_down&#91;u]&#91;k+1];\n\t\t}\n\t\t\n\t\tfor(int k=1;k&lt;=4;k++){\n\t\t\tif(s&#91;u]==target&#91;k+1]){\n\t\t\t\tdp_up&#91;u]&#91;k+1]+=dp_up&#91;v]&#91;k];\n\t\t\t}\n\t\t\tif(s&#91;u]==target&#91;k]){\n\t\t\t\tdp_down&#91;u]&#91;k]+=dp_down&#91;v]&#91;k+1];\n\t\t\t}\n\t\t}\n\t}\n}\n\nvoid solve(){\n\tcin&gt;&gt;n;\n\tcin&gt;&gt;s;\n\ts=\" \"+s;\n\t\n\tfor(int i=1;i&lt;=n;i++){\n\t\tadj&#91;i].clear();\n\t}ans=0;\n\t\n\tfor(int i=1;i&lt;n;i++){\n\t\tint u,v;\n\t\tcin&gt;&gt;u&gt;&gt;v;\n\t\t\n\t\tadj&#91;u].push_back(v);\n\t\tadj&#91;v].push_back(u);\n\t}\n\t\n\tdfs(1,0);\n\tcout&lt;&lt;ans&lt;&lt;endl;\n}\n\nsigned main(){\n\tios::sync_with_stdio(false);\n\tcin.tie(nullptr);cout.tie(nullptr);\n\t\n\tint t;cin&gt;&gt;t;while(t--)\n\tsolve();\n\treturn 0;\n}\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">A. Minimum Product\uff08DP\uff0c\u56fe\u8bba\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u601d\u8def<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e2a\u4eba\u8ba4\u4e3a\u6700\u795e\u5947\u4e00\u9053\u9898\uff0c\u7ed9\u7684\u662f\u56fe\u8bba\uff0c\u9898\u9762\u770b\u7740\u50cf\u56fe\u8bba\uff0c\u4f46\u662f\u57fa\u672c\u6ca1\u600e\u4e48\u7528\u56fe\u8bba\uff0c\u8c01\u4e5f\u4e0d\u4f1a\u60f3\u5230\u4ed6\u7528 DP\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u7528\u56fe\u8bba\u66b4\u529b\u7684\u8bdd\u5fc5\u7136\u8d85\u65f6\uff0c\u56e0\u4e3a n \u6700\u9ad8\u6709 300\uff0c\u8ba9\u4ed6\u4eec\u4e92\u76f8\u7ec4\u5408\uff0c\u6392\u5217\u7ec4\u5408\u7684\u7ec4\u5408\u6570\u4f1a\u76f8\u5f53\u7206\u70b8\uff08300\uff01\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u56e0\u4e3a\u6bcf\u4e00\u4f4d\u8d21\u732e\u90fd\u662f\u6b63\u6570\uff0c\u6211\u4eec\u9700\u8981\u7528 DP \u7684\u4e00\u7ef4\u53bb\u7ef4\u62a4\u8fd9\u662f\u7b2c\u51e0\u4e2a\u70b9\uff0c\u4e8c\u7ef4\u7ef4\u62a4 a\uff0c\u5b83\u7684\u503c\u5b58\u50a8 b\uff0c\u8fdb\u884c DP\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e5f\u6b63\u7531\u4e8e\u4ed6\u7684\u8d21\u732e\u662f\u6b63\u6570\uff0c\u56e0\u6b64\u8fd9\u4e2a DP \u662f\u7b26\u5408\u62d3\u6251\u6392\u5e8f\u7684\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uff08DP\u53c8\u4f55\u5c1d\u4e0d\u662f\u4e00\u79cd DFS\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u662f\u6700\u8ba9\u6211\u53d7\u76ca\u532a\u6d45\u7684\u4e00\u9053\u9898\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u590d\u6742\u5ea6\u5206\u6790<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u65f6\u95f4\u590d\u6742\u5ea6\uff1a$O(m \\times n \\max(a_i))$\uff0c\u6700\u5927\u8ba1\u7b97\u6b21\u6570\u5728 6 \\times 10^7 \u5de6\u53f3\uff0c\u53ef\u4ee5\u987a\u5229\u901a\u8fc7\u3002<br><\/li>\n\n\n\n<li>\u7a7a\u95f4\u590d\u6742\u5ea6\uff1a$O(n^2 \\max(a_i))$\uff0c\u7528\u4e8e\u7ef4\u62a4\u4e8c\u7ef4 DP \u6570\u7ec4\u3002<br><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4ee3\u7801<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ Sunshine sunshine ladybugs awake,\n\/\/ Clap your hooves and do a little shake.\n#ifdef _GLIBCXX_DEBUG\n#undef _GLIBCXX_DEBUG\n#endif\n#ifdef _GLIBCXX_DEBUG_PEDANTIC\n#undef _GLIBCXX_DEBUG_PEDANTIC\n#endif\n#include &lt;bits\/stdc++.h&gt;\n#define int long long\nusing namespace std;\n\nconst int INF=1e18;\n\nvoid solve() {\n\tint n,m;cin&gt;&gt;n&gt;&gt;m;\n\t\n\tint max_s=200*(n-1);\n\tvector&lt;vector&lt;int&gt;&gt; dp(n+1,vector&lt;int&gt;(max_s+1,INF));\n\tdp&#91;1]&#91;0]=0;\n\tvector&lt;int&gt; U(m),V(m),A(m),B(m);\n\tfor(int i=0;i&lt;m;i++){\n\t\tcin&gt;&gt;U&#91;i]&gt;&gt;V&#91;i]&gt;&gt;A&#91;i]&gt;&gt;B&#91;i];\n\t}\n\t\n\tfor(int s=0;s&lt;=max_s;s++){\n\t\tfor(int i=0;i&lt;m;i++){\n\t\t\tint u=U&#91;i],v=V&#91;i],a=A&#91;i],b=B&#91;i];\n\t\t\t\n\t\t\tif(dp&#91;u]&#91;s]!=INF){\n\t\t\t\tif(s+a&lt;=max_s){\n\t\t\t\t\tdp&#91;v]&#91;s+a]=min(dp&#91;v]&#91;s+a],dp&#91;u]&#91;s]+b);\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\t\n\tint ans_prod=INF;\n\tint ans_a=-1,ans_b=-1;\n\t\n\tfor(int s=0;s&lt;=max_s;s++){\n\t\tif(dp&#91;n]&#91;s]!=INF){\n\t\t\tint prod=1ll*s*dp&#91;n]&#91;s];\n\t\t\t\n\t\t\tif(prod&lt;ans_prod){\n\t\t\t\tans_prod=prod;\n\t\t\t\tans_a=s;\n\t\t\t\tans_b=dp&#91;n]&#91;s];\n\t\t\t}else if(prod==ans_prod&amp;&amp;ans_a&gt;s){\n\t\t\t\tans_a=s;\n\t\t\t\tans_b=dp&#91;n]&#91;s];\n\t\t\t}\n\t\t}\n\t}\n\t\n\tcout&lt;&lt;ans_a&lt;&lt;\" \"&lt;&lt;ans_b&lt;&lt;endl;\n}\n\nsigned main() {\n\tios_base::sync_with_stdio(false);\n\tcin.tie(nullptr);\n\tint t; cin &gt;&gt; t; while (t--) solve();\n\treturn 0;\n}\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">K. Point Divide and Conquer\uff08\u6784\u9020\uff0c\u5e76\u67e5\u96c6\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u601d\u8def<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u6211\u4eec\u771f\u6309\u9898\u610f\u53bb<strong>\u6b63\u5411<\/strong>\u6a21\u62df\uff0c\u65f6\u95f4\u590d\u6742\u5ea6\u662f N \u7684\u5e73\u65b9\uff0c\u8fd9\u6837\u5fc5\u7136\u8d85\u65f6\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b63\u786e\u7684\u601d\u8def\u662f\u6b63\u96be\u5219\u53cd\uff0c\u6211\u4eec\u6bcf\u52a0\u4e0a\u4e00\u4e2a\u70b9\u80fd\u5c06\u51e0\u4e2a\u8fde\u901a\u5757\u8fde\u63a5\u8d77\u6765\uff0c\u5e76\u5c06\u539f\u6765\u7684\u6839\u8282\u70b9\u518d\u6307\u5411\u65b0\u7684\u70b9\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u590d\u6742\u5ea6\u5206\u6790<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u65f6\u95f4\u590d\u6742\u5ea6\uff1a$O(n \\cdot \\alpha(n))$\uff0c\u5012\u5e8f\u904d\u5386\u4e00\u6b21\u52a0\u4e0a\u5e76\u67e5\u96c6\u7684\u8def\u5f84\u538b\u7f29\uff0c\u6781\u5feb\u3002<br><\/li>\n\n\n\n<li>\u7a7a\u95f4\u590d\u6742\u5ea6\uff1a$O(n)$\u3002<br><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4ee3\u7801<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ Sunshine, sunshine, ladybugs awake!  \n\/\/ Clap your hooves and do a little shake!  \n#include &lt;bits\/stdc++.h&gt;  \n#define int long long  \n#define endl '\\n'  \nusing namespace std;  \n  \nusing PII=pair&lt;int,int&gt; ;  \nusing PIC=pair&lt;int,char&gt; ;  \n  \nconst int MAXN=100005;  \n  \nint n;  \nint a&#91;MAXN];  \nint f&#91;MAXN];  \nint ans&#91;MAXN];  \nbool vis&#91;MAXN];  \nvector&lt;int&gt; adj&#91;MAXN];  \n  \nint Find(int x){  \n    if(f&#91;x]==x){  \n        return x;        \n    }  \n    return f&#91;x]=Find(f&#91;x]);  \n}  \n  \nvoid Union(int u,int v){  \n    int root_u=Find(u),root_v=Find(v);  \n    if(root_u!=root_v){  \n        f&#91;root_v]=root_u;  \n        ans&#91;root_v]=u;  \n    }  \n}  \n  \nvoid init(){  \n    for(int i=1;i&lt;=n;i++){  \n        f&#91;i]=i;  \n        ans&#91;i]=0;  \n        vis&#91;i]=false;  \n        adj&#91;i].clear();  \n    }  \n}  \n  \nvoid solve() {  \n    cin&gt;&gt;n;  \n    for(int i=1;i&lt;=n;i++)cin&gt;&gt;a&#91;i];  \n    init();  \n    for(int i=1;i&lt;n;i++){  \n        int u,v;  \n        cin&gt;&gt;u&gt;&gt;v;  \n        adj&#91;u].push_back(v);  \n        adj&#91;v].push_back(u);  \n    }  \n    for(int i=n;i&gt;=1;i--){  \n        int u=a&#91;i];  \n        vis&#91;u]=true;  \n        for(auto v:adj&#91;u]){  \n            if(vis&#91;v]){  \n                Union(u,v);  \n            }  \n        }  \n    }  \n    for(int i=1;i&lt;=n;i++){  \n        cout&lt;&lt;ans&#91;i]&lt;&lt;\" \";  \n    }\n    cout&lt;&lt;endl;  \n}  \n\nsigned main() {     \n    ios_base::sync_with_stdio(false);  \n    cin.tie(NULL);  \n    int t;cin &gt;&gt; t;\n    while (t--) solve();  \n    return 0;  \n}\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">\u81f3\u4e8e\u4e3a\u4ec0\u4e48\u540e\u9762\u7684\u9898\u6ca1\u8865\u56e0\u4e3a\u540e\u9762\u7684\u8fc7\u9898\u6570\u660e\u663e\u51cf\u5c11\u6211\u5e94\u8be5\u518d\u63d0\u9ad8\u4e00\u4e0b\u4e2a\u4eba\u6c34\u5e73\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8d5b\u65f6\u53ea\u5199\u4e86\u4e09\u9053\u9898\uff0c\u7b2c\u56db\u9053\u601d\u8def\u9519\u4e86\u4ece\u800c\u6539\u4e0d\u51fa\u6765\u7b54\u6848\u3002\u4f46\u662f\u6211\u7684\u6c34\u5e73\u4e5f\u5c31\u5230\u8fd9\u91cc\u4e86\uff0c\u5c5e\u4e8e\u6b63\u5e38\u53d1\u6325\u3002\u540e\u7eed\u8865\u9898\u53d1\u73b0\u9898\u7684\u8d28\u91cf [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":30,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,17,12,11,14,1,10,13],"tags":[],"class_list":["post-84","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ccpc-vp","category-dp","category-12","category-11","category-14","category-learn","category-10","category-13"],"_links":{"self":[{"href":"https:\/\/huxiaole.cloud\/index.php\/wp-json\/wp\/v2\/posts\/84","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/huxiaole.cloud\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/huxiaole.cloud\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/huxiaole.cloud\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/huxiaole.cloud\/index.php\/wp-json\/wp\/v2\/comments?post=84"}],"version-history":[{"count":2,"href":"https:\/\/huxiaole.cloud\/index.php\/wp-json\/wp\/v2\/posts\/84\/revisions"}],"predecessor-version":[{"id":202,"href":"https:\/\/huxiaole.cloud\/index.php\/wp-json\/wp\/v2\/posts\/84\/revisions\/202"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/huxiaole.cloud\/index.php\/wp-json\/wp\/v2\/media\/30"}],"wp:attachment":[{"href":"https:\/\/huxiaole.cloud\/index.php\/wp-json\/wp\/v2\/media?parent=84"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/huxiaole.cloud\/index.php\/wp-json\/wp\/v2\/categories?post=84"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/huxiaole.cloud\/index.php\/wp-json\/wp\/v2\/tags?post=84"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}