Nebius Round 2 (Codeforces Round 1088, Div. 1 + Div. 2)
C1
Equal Multisets (Easy Version)
Codeforces
1300
原题
← BC2 →
翻译中…

This is the easy version of the problem. The difference between the versions is that in this version, the array $a$ is guaranteed to be a permutation. You can hack only if you solved all versions of this problem.

翻译中…

Given an array $a$ of size $n$, and a parameter $k$, an array $b$ is called cool if the following conditions hold:

翻译中…
  • For each $i$ from $k$ to $n$, the array $[a_{i-k+1},a_{i-k+2},\ldots,a_i]$ is a rearrangement of $[b_{i-k+1},b_{i-k+2},\ldots,b_i]$.
翻译中…

You are given two arrays $a$ and $b$ of size $n$, and an integer $k$. The array $a$ is guaranteed to be a permutation$^{\text{∗}}$. The array $b$ only contains integers from $1$ to $n$, and $-1$.

翻译中…

Determine if it is possible to replace all $-1$ in $b$ with an integer from $1$ to $n$, such that $b$ is cool with respect to $k$.

翻译中…

$^{\text{∗}}$A permutation of length $n$ is an array consisting of $n$ distinct integers from $1$ to $n$ in arbitrary order. For example, $[2,3,1,5,4]$ is a permutation, but $[1,2,2]$ is not a permutation ($2$ appears twice in the array), and $[1,3,4]$ is also not a permutation ($n=3$ but there is $4$ in the array).

翻译中…

Input

翻译中…

Each test contains multiple test cases. The first line contains the number of test cases $t$ ($1 \le t \le 10^4$). The description of the test cases follows.

翻译中…

The first line of each test case contains two integers $n$ and $k$ ($1 \leq k \leq n \leq 2\cdot 10^5$).

翻译中…

The second line of each test case contains $n$ integers $a_1,a_2,\ldots,a_n$ ($1 \le a_i \le n$). In this version, it is guaranteed that each number from $1$ to $n$ appears exactly once.

翻译中…

The third line of each test case contains $n$ integers $b_1,b_2,\ldots,b_n$ ($1 \leq b_i \leq n$ or $b_i=-1$).

翻译中…

It is guaranteed that the sum of $n$ across all test cases does not exceed $2\cdot 10^5$.

翻译中…

Output

翻译中…

For each test case, output YES if possible, and NO otherwise. You may print each letter in either uppercase or lowercase.

翻译中…

Note

翻译中…

In the first test case, we have $k=5$. The only subarray of size $5$ is $[1,5]$. We can see that $b$ is a rearrangement of $a$, so the answer is YES.

翻译中…

In the second test case, it can be shown that it is impossible to replace all $-1$ in $b$ such that every subarray of size $k=4$ are rearrangements of each other.

翻译中…

样例

Input #1
4
5 5
1 2 3 4 5
3 1 5 2 4
5 4
4 1 2 5 3
2 -1 -1 -1 -1
6 4
1 2 4 3 5 6
-1 -1 3 -1 -1 -1
6 4
1 2 4 3 5 6
-1 -1 3 3 -1 -1
Output #1
YES
NO
YES
NO
InputCopy OutputCopy
题目信息
题号
2211C1
时间限制
2 s
内存限制
256 MB
标签
二分
暴力
贪心
双指针

题面与样例版权归 Codeforces 及出题人所有;中文翻译由 AI 生成(CI 管线),如有出入请以原文为准。