【BZOJ】3670: [Noi2014]动物园

http://www.lydsy.com/JudgeOnline/problem.php?id=3670

题意：太水了= =

#include <bits/stdc++.h>
using namespace std;
const int N=1000005, mo=1000000007;
int n, p[N], pos[N], num[N], tot;
char s[N];
bool vis[N];
void dfs(int x) { if(p[x]) dfs(p[x]); vis[x]=1; pos[++tot]=x; }
void work(int x) {
	tot=0;
	dfs(x);
	for(int i=1, j=0; i<=tot; ++i) {
		while(pos[j+1]*2<=pos[i]) ++j;
		num[pos[i]]=j;
	}
}
void clr() { memset(p, 0, sizeof(int)*(n+1)); memset(vis, 0, sizeof(bool)*(n+1)); memset(num, 0, sizeof(int)*(n+1)); }
int main() {
	int T; scanf("%d", &T);
	while(T--) {
		scanf("%s", s+1);
		n=strlen(s+1);
		int j=0;
		for(int i=2; i<=n; ++i) {
			while(j && s[j+1]!=s[i]) j=p[j];
			if(s[j+1]==s[i]) ++j;
			p[i]=j;
		}
		for(int i=n; i>=1; --i) if(!vis[i]) work(i);
		long long ans=1;
		for(int i=1; i<=n; ++i) (ans*=(num[i]+1))%=mo;
		printf("%lld\n", ans);
		clr();
	}
	return 0;
}

　　

这种题放在noi= =无语= =

大概就是随便搞搞就行辣...