A12547. Lynyrd Skynyrd
编程题
普及/提高-
知识点
题目描述
Recently Lynyrd and Skynyrd went to a shop where Lynyrd bought a permutation $p$ of length $n$ , and Skynyrd bought an array $a$ of length $m$ , consisting of integers from $1$ to $n$ .
Lynyrd and Skynyrd became bored, so they asked you $q$ queries, each of which has the following form: "does the subsegment of $a$ from the $l$ -th to the $r$ -th positions, inclusive, have a subsequence that is a cyclic shift of $p$ ?" Please answer the queries.
A permutation of length $n$ is a sequence of $n$ integers such that each integer from $1$ to $n$ appears exactly once in it.
A cyclic shift of a permutation $(p_1, p_2, \ldots, p_n)$ is a permutation $(p_i, p_{i + 1}, \ldots, p_{n}, p_1, p_2, \ldots, p_{i - 1})$ for some $i$ from $1$ to $n$ . For example, a permutation $(2, 1, 3)$ has three distinct cyclic shifts: $(2, 1, 3)$ , $(1, 3, 2)$ , $(3, 2, 1)$ .
A subsequence of a subsegment of array $a$ from the $l$ -th to the $r$ -th positions, inclusive, is a sequence $a_{i_1}, a_{i_2}, \ldots, a_{i_k}$ for some $i_1, i_2, \ldots, i_k$ such that $l \leq i_1 < i_2 < \ldots < i_k \leq r$ .
Lynyrd and Skynyrd became bored, so they asked you $q$ queries, each of which has the following form: "does the subsegment of $a$ from the $l$ -th to the $r$ -th positions, inclusive, have a subsequence that is a cyclic shift of $p$ ?" Please answer the queries.
A permutation of length $n$ is a sequence of $n$ integers such that each integer from $1$ to $n$ appears exactly once in it.
A cyclic shift of a permutation $(p_1, p_2, \ldots, p_n)$ is a permutation $(p_i, p_{i + 1}, \ldots, p_{n}, p_1, p_2, \ldots, p_{i - 1})$ for some $i$ from $1$ to $n$ . For example, a permutation $(2, 1, 3)$ has three distinct cyclic shifts: $(2, 1, 3)$ , $(1, 3, 2)$ , $(3, 2, 1)$ .
A subsequence of a subsegment of array $a$ from the $l$ -th to the $r$ -th positions, inclusive, is a sequence $a_{i_1}, a_{i_2}, \ldots, a_{i_k}$ for some $i_1, i_2, \ldots, i_k$ such that $l \leq i_1 < i_2 < \ldots < i_k \leq r$ .
输入格式
The first line contains three integers $n$ , $m$ , $q$ ( $1 \le n, m, q \le 2 \cdot 10^5$ ) — the length of the permutation $p$ , the length of the array $a$ and the number of queries.
The next line contains $n$ integers from $1$ to $n$ , where the $i$ -th of them is the $i$ -th element of the permutation. Each integer from $1$ to $n$ appears exactly once.
The next line contains $m$ integers from $1$ to $n$ , the $i$ -th of them is the $i$ -th element of the array $a$ .
The next $q$ lines describe queries. The $i$ -th of these lines contains two integers $l_i$ and $r_i$ ( $1 \le l_i \le r_i \le m$ ), meaning that the $i$ -th query is about the subsegment of the array from the $l_i$ -th to the $r_i$ -th positions, inclusive.
The next line contains $n$ integers from $1$ to $n$ , where the $i$ -th of them is the $i$ -th element of the permutation. Each integer from $1$ to $n$ appears exactly once.
The next line contains $m$ integers from $1$ to $n$ , the $i$ -th of them is the $i$ -th element of the array $a$ .
The next $q$ lines describe queries. The $i$ -th of these lines contains two integers $l_i$ and $r_i$ ( $1 \le l_i \le r_i \le m$ ), meaning that the $i$ -th query is about the subsegment of the array from the $l_i$ -th to the $r_i$ -th positions, inclusive.
输出格式
Print a single string of length $q$ , consisting of $0$ and $1$ , the digit on the $i$ -th positions should be $1$ , if the subsegment of array $a$ from the $l_i$ -th to the $r_i$ -th positions, inclusive, contains a subsequence that is a cyclic shift of $p$ , and $0$ otherwise.
输入输出样例
输入 #1
3 6 3 2 1 3 1 2 3 1 2 3 1 5 2 6 3 5
输出 #1
110
输入 #2
2 4 3 2 1 1 1 2 2 1 2 2 3 3 4
输出 #2
010
说明/提示
In the first example the segment from the $1$ -st to the $5$ -th positions is $1, 2, 3, 1, 2$ . There is a subsequence $1, 3, 2$ that is a cyclic shift of the permutation. The subsegment from the $2$ -nd to the $6$ -th positions also contains a subsequence $2, 1, 3$ that is equal to the permutation. The subsegment from the $3$ -rd to the $5$ -th positions is $3, 1, 2$ , there is only one subsequence of length $3$ ( $3, 1, 2$ ), but it is not a cyclic shift of the permutation.
In the second example the possible cyclic shifts are $1, 2$ and $2, 1$ . The subsegment from the $1$ -st to the $2$ -nd positions is $1, 1$ , its subsequences are not cyclic shifts of the permutation. The subsegment from the $2$ -nd to the $3$ -rd positions is $1, 2$ , it coincides with the permutation. The subsegment from the $3$ to the $4$ positions is $2, 2$ , its subsequences are not cyclic shifts of the permutation.
In the second example the possible cyclic shifts are $1, 2$ and $2, 1$ . The subsegment from the $1$ -st to the $2$ -nd positions is $1, 1$ , its subsequences are not cyclic shifts of the permutation. The subsegment from the $2$ -nd to the $3$ -rd positions is $1, 2$ , it coincides with the permutation. The subsegment from the $3$ to the $4$ positions is $2, 2$ , its subsequences are not cyclic shifts of the permutation.