动物园

https://www.luogu.org/problemnew/show/P2375

跑两遍来初始化next与num;

#include <iostream>
#include <cstring>
#include <cstdio>
using namespace std;

const int M=1000005;
const long long OD=1000000007;
char a[M];
int n,t;
long long ans,p[M],j;

long long num(int s,int xx){
	if(p[s]<=1) return p[s];
	if(p[s]<=xx/2)
		return 1+num(p[s],xx);
	return num(p[s],xx);
}

void work(){
	for (int i=1;i<n;i++){
		while (j>0 && a[j+1]!=a[i+1]) j=p[j];
		if (a[j+1]==a[i+1]) j++; p[i+1]=j;
		ans=ans*(num(i+1,i+1)+1ll)*1ll%OD;
		//printf("%d %lld\n",i+1,num(i+1,i+1));
	}
}

int main(){
	scanf("%d",&t);
	for(int i=1;i<=t;i++){
		scanf("%s",a+1);
		n=strlen(a+1);p[1]=0;j=0;ans=1ll;
		work();printf("%lld\n",ans);
    }
    return 0;
}