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## Learning Opportunities

This puzzle can be solved using the following concepts. Practice using these concepts and improve your skills.

## Goal

Dominoes have been placed on a grid.
All the dominoes with values between 0 and n appear exactly once, where n is given in the inputs.

We must find the disposition of these dominoes, given that all the problems have a unique solution.

Example

If n = 2, they are 6 dominoes: 0-0, 0-1, 0-2, 1-1, 1-2 and 2-2.

With this grid:

0021
1120
0212

there is only one position for dominoes 0-0, 1-1 and 2-2
(0-0 and 1-1 horizontal, 2-2 vertical)

==|1
==|0
0212

Then, we can find dominoes 0-1, 0-2 and 1-2
(0-2 and 1-2 horizontal, 0-1 vertical)

which leads to the final solution:

==||
==||
====
Input
Line 1: highest value n on the dominoes
Line 2: height h and width w of the grid.
h following lines: the content of the grid of domino's values.
Output
h lines: with only | or=
| for a vertical domino, = for a horizontal domino
Constraints
1 <= n <= 6
2 <= h, w <= 8
Example
Input
```1
2 3
011
100```
Output
```|==
|==```

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