牛客多校（序列自动机）

链接：https://www.nowcoder.com/acm/contest/156/D
来源：牛客网
 

#include
#include
#include
#include
#include
#include
#include
#include
#define mem(a,x) memset(a,x,sizeof(a))
#define s1(x) scanf("%d",&x)
#define s2(x,y) scanf("%d%d",&x,&y)
#define s3(x,y,z) scanf("%d%d%d",&x,&y,&z)
#define s4(x,y,z,k) scanf("%d%d%d%d",&x,&y,&z,&k)
#define ff(a,n) for(int i = 0 ; i < n; i++) scanf("%d",a+i)
#define tp(x) printf("x = %d\n",x)
#define ansp(x) printf("%d\n",x)
//inline ll ask(int x){ll res=0;while(x)res+=c[x],x-=x&(-x);return res;}
//inline void add(int x,int d){while(x<=n)c[x]+=d,x+=x&(-x);}
#define ls 2*rt
#define rs 2*rt+1
#define lson ls,L,mid
#define rson rs,mid+1,R
#define ll long long
using namespace std;
typedef pair pii;
const ll inf = 0x3f3f3f3f;

const int mx = 3400;
int ne[mx][20];
char a[] ="abcdefghi";
char s[mx];
int main(){
	//int T=10;	scanf("%d",&T);
	//	freopen("F:\\in.txt","r",stdin);
	scanf("%s",s+1);
	int len = strlen(s+1);
	mem(ne,0);
	for(int i = len ; i > 0; i--){
		for(int  j= 0; j < 9; j++)
			ne[i-1][j] = ne[i][j];
		ne[i-1][s[i]-'a'] = i;
	} 
/*	for(int i = 1 ; i <= len; i++){
		if(!first[s[i]-'a'])
			first[s[i]-'a'] = i;
	}*/
	int co,ob,pos,ans=0;
	do{
		//printf("字符串 = %s\n",a); 
		pos = 0;
	   	co = 0;
		ob = ne[0][a[0]-'a'];
		while(ob != 0&&co < 9){     //这里错写小于等于 
				co++;
				ob = ne[ob][a[++pos]-'a'];
		}
	//	cout<<"co="<