KMP hia~hia~hia~

#include <cstdio>
#include <iostream>
#include <cstring>
using namespace std;
int k;
int nex[100005];
char s[200005];
char b[1005];
int lenb;
inline void kmp1(){
    memset(nex,0,sizeof(nex));
    nex[0]=0;
    for(int i=1,p=0;i<lenb;i++){
        while(p>0&&b[p]!=b[i]) p=nex[p-1];
        if(b[p]==b[i]) p++;
        nex[i]=p;
    }
}
int main(){
    freopen("kmp.in","r",stdin);
    freopen("kmp.out","w",stdout);
    scanf("%d",&k);
    while(k--){
      int n;
      scanf("%s",b);
      lenb=strlen(b);
      kmp1();
      scanf("%d",&n);
      for(int i=1;i<=n;i++){
          memset(s,0,sizeof(s));
          scanf("%s",s+1);
          bool flag=0;
          int lens=strlen(s+1);
          for(int j=1,p=0;j<=lens;j++){
              while(p>0&&s[j]!=b[p]) p=nex[p-1];
              if(s[j]==b[p]) p++;
              if(p==lenb){
                  flag=1;
                  printf("%d ",j-lenb+1);
              }
        }
         if(!flag){
             cout<<0<<" ";
         }
         cout<<endl;
      }

    }
    return 0;
}

附上一個講的極明白的網站
http://www.cnblogs.com/c-cloud/p/3224788.html