{"id":849,"date":"2019-04-03T19:29:55","date_gmt":"2019-04-03T11:29:55","guid":{"rendered":"http:\/\/SmokeyDays.top\/wordpress\/?p=849"},"modified":"2019-04-03T19:29:55","modified_gmt":"2019-04-03T11:29:55","slug":"lp3203-hnoi2010-%e5%bc%b9%e9%a3%9e%e7%bb%b5%e7%be%8a","status":"publish","type":"post","link":"http:\/\/SmokeyDays.top\/wordpress\/2019\/04\/03\/lp3203-hnoi2010-%e5%bc%b9%e9%a3%9e%e7%bb%b5%e7%be%8a\/","title":{"rendered":"lp3203 HNOI2010 \u5f39\u98de\u7ef5\u7f8a"},"content":{"rendered":"\n<p>\u4f9d\u7167\u9898\u610f\uff0c\u6211\u4eec\u53d1\u73b0\uff0c\u9898\u76ee\u6c42\u7684\u5c31\u662f\u6307\u5b9a\u70b9\u5230\u6839\u7684\u8def\u5f84\u957f\u5ea6\u3002<br>\n\u4e8e\u662f\uff0c\u6211\u4eec\u5bf9\u4e8e\u6bcf\u4e00\u4e2a\u4fee\u6539\u5f39\u529b\u7684\u64cd\u4f5c\uff0c\u90fd\u53ef\u4ee5\u8f6c\u5316\u4e3a\u65ad\u8fb9\u548c\u8fde\u8fb9\u7684\u64cd\u4f5c\u3002<br>\n\u90a3\u4e48\uff0c\u6211\u4eec\u7528Splay\u7ef4\u62a4\u5927\u5c0f\uff0c\u5c31\u53ef\u4ee5\u5b9e\u73b0\u4e86\u3002<br>\n\u6ce8\u610f\uff1asz\u6570\u7ec4\u9700\u8981\u521d\u59cb\u5316\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include&lt;iostream>\n#include&lt;cstdio>\n#include&lt;cstring>\n#include&lt;algorithm>\n#include&lt;queue>\n#include&lt;vector>\nusing namespace std;\ninline void Swap(int &amp;A,int &amp;B){\n\tA^=B^=A^=B;\n}\nconst int N=200005;\nint fa[N],ch[N][2],sz[N];\ninline void updt(int X){\n\tsz[X]=sz[ch[X][0]]+sz[ch[X][1]]+1;\n}\ninline bool fndD(int X){\n\treturn ch[fa[X]][1]==X;\n}\ninline bool ntrt(int X){\n\treturn ch[fa[X]][0]==X||ch[fa[X]][1]==X;\n}\ninline void splayOne(int X){\n\tint Y=fa[X],Z=fa[Y],D=fndD(X),D2=fndD(Y),C=ch[X][D^1];\n\tif(ntrt(Y)){\n\t\tch[Z][D2]=X;\n\t}\n\tch[X][D^1]=Y,ch[Y][D]=C;\n\tif(C){\n\t\tfa[C]=Y;\n\t}\n\tfa[Y]=X,fa[X]=Z;\n\tupdt(Y),updt(X);\n}\nint st[N];\ninline void splay(int X){\n\tint Y=X;\n\twhile(ntrt(X)){\n\t\tY=fa[X];\n\t\tif(ntrt(Y)){\n\t\t\tsplayOne(fndD(X)^fndD(Y)?X:Y);\n\t\t}\n\t\tsplayOne(X);\n\t} \n}\ninline void access(int X){\n\tfor(int Y=0;X;Y=X,X=fa[X]){\n\t\tsplay(X),ch[X][1]=Y,updt(X);\n\t}\n}\n\/\/\u4ee4X\u5728Y\u7684\u4e0a\u65b9\u3002 \n\/\/\u7531\u4e8e\u8fd9\u91cc\u4fdd\u8bc1\u5b58\u5728\u6709\u8fb9\uff0c\u6240\u4ee5\u76f4\u63a5\u65ad\u8fb9\u5373\u53ef\u3002 \ninline void cut(int X){\n\taccess(X),splay(X);\n\/\/\tsplay(Y);\n\/\/\tfa[X]=ch[Y][0]=0;\n\tch[X][0]=fa[ch[X][0]]=0;\n}\ninline void link(int X,int Y){\n\tfa[Y]=X;\n\tupdt(X);\n}\nint a[N];\nint n,q;\nvoid init(){\n\tscanf(\"%d\",&amp;n);\n\tfor(int i=1;i&lt;=n;++i){\n\t\tsz[i]=1;\n\/\/\t\t\u8bb0\u5f97\u521d\u59cb\u5316sz\u6570\u7ec4 \n\t\tscanf(\"%d\",&amp;a[i]);\n\t\tif(i+a[i]&lt;=n){\n\t\t\tlink(i+a[i],i);\n\t\t}\n\t}\n\tscanf(\"%d\",&amp;q);\n\tint X,Y,op;\n\tfor(int i=1;i&lt;=q;++i){\n\t\tscanf(\"%d\",&amp;op);\n\t\tif(op==1){\n\t\t\tscanf(\"%d\",&amp;X);++X;\n\t\t\taccess(X),splay(X);\n\t\t\tprintf(\"%d\\n\",sz[X]);\n\t\t}else{\n\t\t\tscanf(\"%d%d\",&amp;X,&amp;Y);++X;\n\t\t\tif(X+a[X]&lt;=n){\n\t\t\t\tcut(X);\n\t\t\t}\n\t\t\taccess(X),splay(X);\n\t\t\tif(X+Y&lt;=n){\n\t\t\t\tlink(X+Y,X);\n\t\t\t}\n\t\t\ta[X]=Y;\n\t\t}\n\t}\n}\nint main(){\n\/\/\tfreopen(\"3203.in\",\"r\",stdin);\n\/\/\tfreopen(\"3203.myout\",\"w\",stdout);\n\tinit();\n\treturn 0;\n}\n\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u4f9d\u7167\u9898\u610f\uff0c\u6211\u4eec\u53d1\u73b0\uff0c\u9898\u76ee\u6c42\u7684\u5c31\u662f\u6307\u5b9a\u70b9\u5230\u6839\u7684\u8def\u5f84\u957f\u5ea6\u3002 \u4e8e\u662f\uff0c\u6211\u4eec\u5bf9\u4e8e\u6bcf\u4e00\u4e2a\u4fee\u6539\u5f39\u529b\u7684\u64cd\u4f5c\uff0c\u90fd\u53ef\u4ee5\u8f6c\u5316\u4e3a\u65ad\u8fb9\u548c &hellip; <\/p>\n<p class=\"link-more\"><a href=\"http:\/\/SmokeyDays.top\/wordpress\/2019\/04\/03\/lp3203-hnoi2010-%e5%bc%b9%e9%a3%9e%e7%bb%b5%e7%be%8a\/\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">\u201clp3203 HNOI2010 \u5f39\u98de\u7ef5\u7f8a\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[30,106,56,70,8,9,6,5],"tags":[],"_links":{"self":[{"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/posts\/849"}],"collection":[{"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/comments?post=849"}],"version-history":[{"count":1,"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/posts\/849\/revisions"}],"predecessor-version":[{"id":850,"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/posts\/849\/revisions\/850"}],"wp:attachment":[{"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/media?parent=849"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/categories?post=849"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/tags?post=849"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}