{"id":226,"date":"2012-11-03T13:59:00","date_gmt":"2012-11-03T05:59:00","guid":{"rendered":"http:\/\/nike0good.jp1.rpvhost.net\/131"},"modified":"2012-11-03T13:59:00","modified_gmt":"2012-11-03T05:59:00","slug":"advanced_typewriter_tries","status":"publish","type":"post","link":"https:\/\/nike0good.com\/?p=226","title":{"rendered":"\u9ad8\u7ea7\u6253\u5b57\u673a (Tries\uff09"},"content":{"rendered":"

Problem 1 \u9ad8\u7ea7\u6253\u5b57\u673a(type.cpp\/c\/pas)<\/p>\n

\u3010\u9898\u76ee\u63cf\u8ff0\u3011<\/p>\n

\u65e9\u82d7\u5165\u624b\u4e86\u6700\u65b0\u7684\u9ad8\u7ea7\u6253\u5b57\u673a\u3002\u6700\u65b0\u6b3e\u81ea\u7136\u6709\u7740\u4e0e\u4ee5\u5f80\u4e0d\u540c\u7684\u529f\u80fd\uff0c\u90a3\u5c31\u662f\u5b83\u5177\u5907\u64a4\u9500\u529f\u80fd\uff0c\u5389\u5bb3\u5427\u3002<\/p>\n

\u8bf7\u4e3a\u8fd9\u79cd\u9ad8\u7ea7\u6253\u5b57\u673a\u8bbe\u8ba1\u4e00\u4e2a\u7a0b\u5e8f\uff0c\u652f\u6301\u5982\u4e0b3\u79cd\u64cd\u4f5c\uff1a<\/p>\n

1.T x\uff1a\u5728\u6587\u7ae0\u672b\u5c3e\u6253\u4e0b\u4e00\u4e2a\u5c0f\u5199\u5b57\u6bcdx\u3002(type\u64cd\u4f5c)<\/p>\n

2.U x\uff1a\u64a4\u9500\u6700\u540e\u7684x\u6b21\u4fee\u6539\u64cd\u4f5c\u3002\uff08Undo\u64cd\u4f5c\uff09<\/p>\n

\uff08\u6ce8\u610fQuery\u64cd\u4f5c\u5e76\u4e0d\u7b97\u4fee\u6539\u64cd\u4f5c\uff09<\/p>\n

3.Q x\uff1a\u8be2\u95ee\u5f53\u524d\u6587\u7ae0\u4e2d\u7b2cx\u4e2a\u5b57\u6bcd\u5e76\u8f93\u51fa\u3002\uff08Query\u64cd\u4f5c\uff09<\/p>\n

\u6587\u7ae0\u4e00\u5f00\u59cb\u53ef\u4ee5\u89c6\u4e3a\u7a7a\u4e32\u3002<\/p>\n

 <\/p>\n

\u3010\u8f93\u5165格\u5f0f\u3011<\/p>\n

\u7b2c1\u884c\uff1a\u4e00\u4e2a\u6574\u6570n\uff0c\u8868\u793a\u64cd\u4f5c\u6570\u91cf\u3002<\/p>\n

\u4ee5\u4e0bn\u884c\uff0c\u6bcf\u884c\u4e00\u4e2a\u547d\u4ee4\u3002\u4fdd\u8bc1\u8f93\u5165\u7684\u547d\u4ee4\u5408\u6cd5\u3002<\/p>\n

 <\/p>\n

\u3010\u8f93\u51fa格\u5f0f\u3011<\/p>\n

\u6bcf\u884c\u8f93\u51fa\u4e00\u4e2a\u5b57\u6bcd\uff0c\u8868\u793aQuery\u64cd\u4f5c\u7684\u7b54\u6848\u3002<\/p>\n

 <\/p>\n

\u3010\u6837\u4f8b\u8f93\u5165\u3011<\/p>\n

7<\/p>\n

T a<\/p>\n

T b<\/p>\n

T c<\/p>\n

Q 2<\/p>\n

U 2<\/p>\n

T c<\/p>\n

Q 2<\/p>\n

\u3010\u6837\u4f8b\u8f93\u51fa\u3011<\/p>\n

b<\/p>\n

c<\/p>\n

\u3010\u6570\u636e\u8303\u56f4\u3011<\/p>\n

\u5bf9\u4e8e40%\u7684\u6570\u636e n<=200;<\/p>\n

\u5bf9\u4e8e100%\u7684\u6570\u636e n<=100000\uff1b\u4fdd\u8bc1Undo\u64cd\u4f5c\u4e0d\u4f1a\u64a4\u9500Undo\u64cd\u4f5c\u3002<\/p>\n

<\u9ad8\u7ea7\u6311\u6218><\/p>\n

\u5bf9\u4e8e200%\u7684\u6570\u636e n<=100000\uff1bUndo\u64cd\u4f5c\u53ef\u4ee5\u64a4\u9500Undo\u64cd\u4f5c\u3002<\/p>\n

<IOI\u6311\u6218><\/p>\n

\u5fc5\u987b\u4f7f\u7528\u5728\u7ebf\u7b97\u6cd5\u5b8c\u6210\u8be5\u9898\u3002<\/p>\n

\n<\/p>\n

\u8fd9\u9898\u8981\u7528\u5b57\u5178\u6811\uff08Tries)<\/p>\n

\u8fd8\u6709msm\uff08\u500d\u589e\u7b97\u6cd5\uff09<\/p>\n

\n<\/p>\n

\u53e6\u5916 \u8865\u5145\u4e00\u70b9<\/p>\n

char  s[0]   \u6216\u8005 char <\/p>\n

scanf("%s",s)<\/p>\n

 \u8fd9\u53e5\u4f1a\u5b58\u4e0d\u4e0b"\u0000"<\/p>\n

\u56e0\u6b64\u4f1a\u628a\u6b63\u5728\u5faa\u73af\u7684\u81ea\u53d8\u91cfi \u53d8\u6210 0<\/p>\n

\n<\/p>\n

#include<cstdio>\n#include<cstring>\n#include<cstdlib>\n#include<iostream>\n#include<cmath>\n#include<vector>\n#include<cctype>\nusing namespace std;\n#define MAXN (100000+10)\n#define LOGMAXN (16+10)\nint n,tot=0;\nstruct Tnode\n{\n\tint deep,f[LOGMAXN];\n\tchar edge;\n\tTnode()\n\t{\n\t\tmemset(f,0,sizeof(f));\n\t\tdeep=-1;\n\t\tedge='\u0000';\n\t}\n\tTnode(char _edge,int _fa,int _deep)\n\t{\n\t\tmemset(f,0,sizeof(f));\n\t\tf[0]=_fa;\n\t\tedge=_edge;\n\t\tdeep=_deep;\n\t}\n\tint logdeep()\n\t{\n\t\treturn int(trunc(log(deep)\/log(2)));\n\t}\n}node[MAXN];\nint log2(int a)\n{\n\treturn int(trunc(log(a)\/log(2)));\n}\nvoid msm(Tnode &a)\n{\n\tint n=a.logdeep();\n\/\/\tif (n==1) return;\n\tfor (int i=1;i<=n;i++)\n\t{\n\t\ta.f[i]=node[a.f[i-1]].f[i-1];\n\t}\n}\nvoid type()\n{\n\tchar c;\n\tscanf("%s",&c);\n\ttot++;\n\tnode[tot]=Tnode(c,tot-1,node[tot-1].deep+1);\n\tmsm(node[tot]);\n}\n\nvoid quere()\n{\n\tint p;\n\tscanf("%d",&p);\n\tTnode now=node[tot];\n\tp=now.deep+1-p; \/\/\u7b2ci's \u7956\u5148\n\twhile (p)\n\t{\n\t\tint i=log2(p);\n\t\tp-=(1<<i);\n\t\tnow=node[now.f[i]];\n\n\t}\n\tprintf("%cn",now.edge);\n\n}\nvoid undo()\n{\n\tint p;\n\tscanf("%d",&p);\n\ttot++;\n\tnode[tot]=node[tot-1-p];\n}\nint main()\n{\n\tfreopen("type.in","r",stdin);\n\tfreopen("type.out","w",stdout);\n\tscanf("%d",&n);\n\tnode[0]=Tnode();\n\tfor (int ii=1;ii<=n;ii++)\n\t{\n\/\/\t\tprintf("%dn",ii);\n\t\tchar s[10];\n\/\/\t\tprintf("%dn",ii);\n\t\tscanf("%s",s);\n\/\/\t\tprintf("%dn",ii);\n\/\/\t\twhile(1);\n\t\tswitch(s[0])\n\t\t{\n\t\t\tcase 'T':type();break;\n\t\t\tcase 'U':undo();break;\n\t\t\tcase 'Q':quere();break;\n\t\t}\n\n\n\t}\n\/\/\twhile (1);\n\treturn 0;\n}\n<\/pre>\n<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
Problem 1 \u9ad8\u7ea7\u6253\u5b57\u673a(type.cpp\/c\/pas) \u3010\u9898\u76ee\u63cf\u8ff0\u3011 \u65e9\u82d7\u5165\u624b\u4e86\u6700\u65b0\u7684\u9ad8\u7ea7\u6253\u5b57\u673a\u3002\u6700\u65b0 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","footnotes":""},"categories":[3],"tags":[29,49],"class_list":["post-226","post","type-post","status-publish","format-standard","hentry","category-defaultcategory","tag-c","tag-tries"],"yoast_head":"\n\u9ad8\u7ea7\u6253\u5b57\u673a (Tries\uff09 - nike0good<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/nike0good.com\/?p=226\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u9ad8\u7ea7\u6253\u5b57\u673a (Tries\uff09 - 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