HDU2222 (AC自动机）

AC自动机模板题。

被卡内存了 死活A不掉。。

AC自动机参考教程:

　　http://www.cppblog.com/menjitianya/archive/2014/07/10/207604.html

 

 1 const maxn=10008;
 2 type arr=record
 3         next:array[0..26] of longint;
 4         fail,cnt:longint;
 5         end;
 6 var cas:longint;
 7     s:array[0..maxn] of string;
 8     T:array[0..200000] of arr;
 9     id:array['a'..'z'] of longint;
10     rt,tmp:longint;
11     b:array[0..100000] of longint;
12 procedure ins(str:string);
13 var now,i:longint;
14 begin
15     now:=rt;
16     for i:=1 to length(str) do
17     begin    
18         if T[now].next[id[str[i]]]=0 then
19         begin
20             inc(tmp);
21             T[now].next[id[str[i]]]:=tmp;
22         end;
23         now:=T[now].next[id[str[i]]];
24     end;
25     inc(T[now].cnt);
26 end;
27 procedure build;
28 var l,r,u,v,i:longint;
29 begin
30     fillchar(b,sizeof(b),0);
31     r:=0;
32     for i:=1 to 26 do
33         if T[rt].next[i]<>0 then
34         begin
35             T[T[rt].next[i]].fail:=rt;
36             inc(r);
37             b[r]:=T[rt].next[i];        
38         end;
39     l:=1; 
40     while l<=r do
41     begin
42         u:=b[l];
43         for i:=1 to 26 do
44         begin
45             v:=T[u].next[i];
46             if v=0 then
47                 T[u].next[i]:=T[T[u].fail].next[i]
48             else
49             begin
50                 T[v].fail:=T[T[u].fail].next[i];
51                 inc(r);
52                 b[r]:=v;
53             end;        
54         end;
55         inc(l);
56     end;
57 end;    
58 function query(st:ansistring):longint;
59 var i,ans,now,j:longint;
60 begin
61     ans:=0; now:=rt;
62     for i:=1 to length(st) do
63     begin
64         now:=T[now].next[id[st[i]]];
65         j:=now;
66         while T[j].cnt>0 do
67         begin
68             ans:=ans+T[j].cnt;
69             T[j].cnt:=0;
70             j:=T[j].fail;
71         end;
72         ans:=ans+T[T[j].fail].cnt;
73         T[T[j].fail].cnt:=0;
74     end;    
75     exit(ans);
76 end;
77 procedure main;
78 var i,n:longint;
79     st:ansistring;
80 begin
81     fillchar(T,sizeof(T),0);
82     for i:=1 to 26 do id[chr(96+i)]:=i;
83     readln(n);
84     for i:=1 to n do readln(s[i]);
85     rt:=0; tmp:=0;
86     for i:=1 to n do ins(s[i]);
87     build;
88     readln(st);
89     writeln(query(st));
90 end;
91 begin
92     readln(cas);
93     while cas>0 do begin dec(cas); main; end;
94 end.

 

posted @ 2015-05-08 10:49  rpSebastian  阅读(194)  评论(0)  编辑  收藏  举报