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## sortlinkedlist
## **WARNING! VERY IMPORTANT!**
For this exercise a function will be tested **with the exam own main**. However the student **still needs** to submit a structured program:
This means that:
- The package needs to be named `package main`.
- The submitted code needs one declared function main(```func main()```) even if empty.
- The function main declared needs to **also pass** the `Restrictions Checker`(illegal functions tester). It is advised for the student to just empty the function main after its own testings are done.
- Every other rules are obviously the same than for a `program`.
### Instructions
You are given a linked list, where each node contains a single digit.
Write a function that sorts the list in descending order and return pointer/reference to new linked list
### Expected function and struct
```go
package piscine
type Node struct {
Next *Node
Num int
}
func Sortll(node *Node) *Node {
}
```
### Usage
Here is a possible program to test your function:
```go
package main
import (
"fmt"
piscine ".."
)
// I implemented pushBack for this
func main() {
num1 := &piscine.Node{Num: 5}
num1 = pushBack(num1, 1)
num1 = pushBack(num1, 3)
num1 = pushBack(num1, 1)
num1 = pushBack(num1, 3)
result := piscine.Sortll(num1)
for tmp := result; tmp != nil; tmp = tmp.Next {
fmt.Print(tmp.Num)
if tmp.Next != nil {
fmt.Print(" -> ")
}
}
fmt.Println()
}
```
Its output:
```console
$> go build
$> ./main
5 -> 3 -> 3 -> 1 -> 1
```