【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...