【BZOJ3670】【UOJ5】【NOI2014】动物园

#include<bits/stdc++.h>
using namespace std;
#define MAXN	1000005
#define P   1000000007
template <typename T> void read(T &x) {
x = 0; int f = 1;
char c = getchar();
for (; !isdigit(c); c = getchar()) if (c == '-') f = -f;
for (; isdigit(c); c = getchar()) x = x * 10 + c - '0';
x *= f;
}
char s[MAXN];
int len[MAXN], num[MAXN], nxt[MAXN];
int main() {
int T; read(T);
while (T--) {
scanf("\n%s", s + 1);
int n = strlen(s + 1);
nxt[1] = 0; num[1] = 1;
for (int i = 2; i <= n; i++) {
int j = nxt[i - 1];
while (j && s[i] != s[j + 1]) j = nxt[j];
if (s[i] == s[j + 1]) j++;
nxt[i] = j; num[i] = num[j] + 1;
}
long long ans = 1;
int pos = 0;
for (int i = 2; i <= n; i++) {
while (pos && s[i] != s[pos + 1]) pos = nxt[pos];
if (s[i] == s[pos + 1]) pos++;
if (pos > i / 2) pos = nxt[pos];
ans = ans * (num[pos] + 1) % P;
}
printf("%lld\n", ans);
}
return 0;
}