HDU 4125 Moles 段树+KMP

#include <cstdio>
#include <cstring>
#include <iostream>
#include <algorithm>
using namespace std;
#pragma comment(linker, "/STACK:1024000000,1024000000")
typedef long long ll;
#define lson l, mid, rt<<1
#define rson mid+1, r, rt<<1|1
template <class T>
inline bool rd(T &ret) {
	char c; int sgn;
	if(c=getchar(),c==EOF) return 0;
	while(c!='-'&&(c<'0'||c>'9')) c=getchar();
	sgn=(c=='-')?-1:1;
	ret=(c=='-')?0:(c-'0');
	while(c=getchar(),c>='0'&&c<='9') ret=ret*10+(c-'0');
	ret*=sgn;
	return 1;
}
template <class T>
inline void pt(T x) {
    if (x <0) {
        putchar('-');
        x = -x;
    }
    if(x>9) pt(x/10);
    putchar(x%10+'0');
}
//
const int N = 600000+5;
const int M = 70000+5;
int mi[N<<2], pos[N];
inline void up(int& fa, int& ls, int& rs) {
	if (ls>rs)
		fa = rs;
	else
		fa = ls;
}
void build(int l, int r, int rt) {
	if (l == r) {
		mi[rt] = pos[l];
	} else {
		int mid = (l+r)>>1;
		build(lson);
		build(rson);
		up(mi[rt], mi[rt<<1], mi[rt<<1|1]);
	}
}
int query(int L, int R, int l, int r, int rt) {
	if (L<= l && r<=R) {
		return mi[rt];
	} else {
		int mid = (l+r)>>1;
		if (L>mid)
			return query(L, R, rson);
		else if (R<=mid)
			return query(L, R, lson);
		else
			return min(query(L, mid, lson), query(mid+1, R, rson));
	}
}
void update(int p, int v, int l, int r, int rt) {
	if (l == r) {
		mi[rt] = v;
	} else {
		int mid = (l+r)>>1;
		if (p <= mid)
			update(p, v, lson);
		else
			update(p, v, rson);
		up(mi[rt], mi[rt<<1], mi[rt<<1|1]);
	}
}


int T = 0, n, a[N], L[N], R[N];
char s[M], ch[N*3];
int nex[M], top;
void dfs(int u, int l, int r) {
	update(u, n+1, 1, n, 1);
	int v = query(l, u, 1, n, 1);
	if (v != n+1) {
		L[u] = a[v];
		dfs(a[v], l, u);
	}
	v = query(u, r, 1, n, 1);
	if (v != n+1) {
		R[u] = a[v];
		dfs(a[v], u, r);
	}
}
void f(int u) {
	char c;
	if (u&1)
		c = '1';
	else
		c = '0';
	ch[top++] = c;
	if (L[u] != -1) {
		f(L[u]);
		ch[top++] = c;
	}
	if (R[u] != -1) {
		f(R[u]);
		ch[top++] = c;
	}
}
void work() {
	int v, len, idx, ans = 0;
	rd(n);
	for (int i = 1; i <= n; ++i) {
		rd(a[i]);
		pos[a[i]] = i;
	}
	build(1, n, 1);
	memset(L, -1, sizeof L);
	memset(R, -1, sizeof R);
	dfs(a[1], 1, n);
	//
	scanf("%s", s);
	len = strlen(s);
	nex[0] = nex[1] = 0;
	for (int i = 1; i < len; ++i) {
		int j = nex[i];
		while (j && s[j] != s[i])
			j = nex[j];
		if (s[i] == s[j])
			nex[i+1] = j+1;
		else
			nex[i+1] = 0;
	}
	//
	top = 0;
	f(a[1]);
	idx = 0;
	for (int i = 0; i < top; ++i) {
		while (idx && s[idx] != ch[i])
			idx = nex[idx];
		if (s[idx] == ch[i])
			++ idx;
		if (idx == len) {
			++ ans;
			idx = nex[idx];
		}
	}
	printf("Case #%d: %d\n", ++T, ans);
}
int main() {
	int cas;
	scanf("%d", &cas);
	while (cas-->0)
		work();
	return 0;
}