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## Cut Corners
### Instructions
Create some functions which behave like JavaScript's `Math` rounding functions:
- `round`: which behaves similar to `Math.round()`.
- `ceil`: which behaves similar to `Math.ceil()`.
- `floor`: which behaves similar to `Math.floor()`.
- `trunc`: which behaves similar to `Math.trunc()`.
> Some restrictions apply:
> - You may not use strings conversion to do it
> - No bitwise operator
> - No `%` operator
### Notions
- [Math](https://devdocs.io/javascript/global_objects/math)
### Code provided
> The provided code will be added to your solution, and does not need to be submitted.
```js
Math.round = Math.ceil = Math.floor = Math.trunc = undefined
```