31952번 - Dihedral Group 다국어

문제

In mathematics, the dihedral group $D_n$ is the group of symmetries of a regular $n$-gon. Rotations and reflections are elements of $D_n,ドル and in fact all elements of the dihedral group can be expressed as a series of rotations and reflections. Elements of $D_n$ act on the $n$-gon by permuting its vertices. For example, consider a regular pentagon with vertices initially labeled 1ドル,ドル 3ドル,ドル 5ドル,ドル 4ドル,ドル 2ドル$ (clockwise, starting from the top):

Applying the above three dihedral actions to the pentagon (a rotation, reflection, and then another rotation) produces the following relabelings of the pentagon's vertices:

1,ドル 3, 5, 4, 2 \rightarrow 2, 1, 3, 5, 4 \rightarrow 2, 4, 5, 3, 1 \rightarrow 1, 2, 4, 5, 3.$

You are given an arbitrary clockwise labeling of the vertices of a regular $n$-gon using the integers 1ドル$ through $n,ドル and a second sequence to test. Determine whether it's possible to apply some series of dihedral actions to the $n$-gon so that the test sequence appears as a contiguous clockwise sequence of vertex labels on the transformed polygon.

입력

The first line of input has two integers $n$ and $m,ドル (1ドル \leq m \leq n \leq 5 \cdot 10^{4}$) where $n$ is the number of vertices of the polygon and $m$ is the length of the sequence to be tested.

The next line contains $n$ space-separated integers $d$ (1ドル \le d \le n$). This is the initial labeling of the polygon vertices. It is guaranteed that each integer from 1ドル$ to $n$ appears exactly once.

The next line contains $m$ space-separated integers $t$ (1ドル \le t \le n$). This is the sequence to be tested.

출력

Output a single integer, which is 1ドル$ if the test sequence could appear as a contiguous sequence of vertex labels after applying some series of dihedral actions to the initial polygon, and 0ドル$ otherwise.

제한

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