atcoder#AGC006E. [AGC006E] Rotate 3x3
[AGC006E] Rotate 3x3
Score : points
Problem Statement
We have a grid with rows and columns. The cell at the -th row and -th column is denoted (, ). Initially, each cell (, ) contains the integer .
A grid with columns
Snuke can perform the following operation any number of times:
- Choose a subrectangle of the grid. The placement of integers within the subrectangle is now rotated by .
An example sequence of operations (each chosen subrectangle is colored blue)
Snuke's objective is to manipulate the grid so that each cell (, ) contains the integer . Determine whether it is achievable.
Constraints
- All are distinct.
Input
The input is given from Standard Input in the following format:
Output
If Snuke's objective is achievable, print Yes
. Otherwise, print No
.
5
9 6 15 12 1
8 5 14 11 2
7 4 13 10 3
Yes
This case corresponds to the figure in the problem statement.
5
1 2 3 4 5
6 7 8 9 10
11 12 13 14 15
No
5
1 4 7 10 13
2 5 8 11 14
3 6 9 12 15
Yes
The objective is already achieved with the initial placement of the integers.
6
15 10 3 4 9 16
14 11 2 5 8 17
13 12 1 6 7 18
Yes
7
21 12 1 16 13 6 7
20 11 2 17 14 5 8
19 10 3 18 15 4 9
No