Zoj 3430 detect the virus (AC automation)

Question:

The following code is used to encode N 64-base viruses.

Then, we will provide M pattern strings for you to decomcode and find out how many virus sequences are contained in them.

Train of Thought Analysis:

A very bare AC automatic machine. But all kinds of nausea.

Dynamic trie static open queue will re.

MLE will be implemented when all the dynamic development is complete.

After various positions, you can open trie statically and enable the queue dynamically to access the AC.

#include <cstdio>#include <iostream>#include <cstring>#include <algorithm>#include <queue>#define maxn 50005using namespace std;const char tab = 0;const int max_next = 256;int tlen=0;int next[maxn][max_next],fail[maxn],num[maxn],mark[maxn],siz;int rev[300];int newnode(){    for(int i=0;i<max_next;i++)        next[siz][i]=0;    fail[siz]=num[siz]=mark[siz]=0;    return siz++;}void Insert(int *s,int len){    int p=0;    for(int i=0;i<len;i++)    {        int &x=next[p][s[i]];        p=x?x:x=newnode();    }    num[p]++;}void acbuild(){    queue<int>Q;    Q.push(0);    while(!Q.empty())    {        int temp=Q.front();        Q.pop();        for(int i=0;i<max_next;i++)        {            int v=next[temp][i];            if(v==0)next[temp][i]=next[fail[temp]][i];            else Q.push(v);            if(temp!=0)fail[v]=next[fail[temp]][i];        }    }}int query(int *s,int len,int id){    int cnt=0;    for(int i=0,p=0;i<len;i++)    {        p=next[p][s[i]];        for(int f=p;f&&mark[f]!=id;f=fail[f]){            mark[f]=id;            if(num[f]>0)cnt++;        }    }    return cnt;}int word[10005];void ReEncode(char *a){    tlen=0;    for(int i=0,len=0,x=0;a[i] && a[i] != '=';++i){        len+=6,x=(x<<6)|rev[a[i]];        if(len>=8){            word[tlen++]=(x>>(len-8))&0xff;            len-=8;        }    }}char tmp[10005];int main(){    for(int i=0;i<26;i++)        rev[i+'A']=i;    for(int i=26;i<52;i++)        rev[i+'a'-26]=i;    for(int i=52;i<62;i++)        rev[i+'0'-52]=i;    rev['+']=62;    rev['/']=63;    int n;    while(scanf("%d",&n)!=EOF)    {        siz=0;        newnode();        for(int i=1;i<=n;i++)        {            scanf("%s",tmp);            ReEncode(tmp);            Insert(word,tlen);        }        acbuild();        scanf("%d",&n);        for(int i=1;i<=n;i++)        {            scanf("%s",tmp);            ReEncode(tmp);            printf("%d\n",query(word,tlen,i));        }        puts("");    }    return 0;}

Zoj 3430 detect the virus (AC automation)