HDU1686 Oulipo

#include<cstdio>
#include<cstdlib>
#include<iostream>
#include<cstring>
#include<string>
#include<algorithm>
#include<memory.h>
using namespace std;
char a[1000010],b[10010];
int Next[10010],L1,L2,ans;
void _next()
{
    int i,k;
    Next[1]=0;
    for(i=2,k=0;i<=L2;i++){
        while(k&&b[k+1]!=b[i]) k=Next[k];
        if(b[k+1]==b[i]) k++;
        Next[i]=k;
    }
}
void _kmp()
{
    _next(); 
    int i,k;
    ans=0;
    for(i=1,k=0;i<=L1;i++){
        while(k&&b[k+1]!=a[i]) k=Next[k];
        if(b[k+1]==a[i]) k++;
        if(k==L2) {
           ans++; k=Next[k];
        }
    }
}
int main()
{
    int T;
    scanf("%d",&T);
    while(T--){
        scanf("%s",b+1);
        scanf("%s",a+1);
        L1=strlen(a+1);
        L2=strlen(b+1);
        _kmp();
        printf("%d\n",ans);
    }
    return 0;
}