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## bigger
### Instructions
Create the function `bigger` that gets the biggest positive number in the `HashMap`.
### Notions
[hash maps](https://doc.rust-lang.org/book/ch08-03-hash-maps.html)
### Expected Function
```rust
pub fn bigger(h: HashMap<&str, i32>) -> i32 {
}
```
### Usage
Here is a program to test your function.
```rust
use std::collections::HashMap;
use bigger::bigger;
fn main() {
let mut hash = HashMap::new();
hash.insert("Daniel", 122);
hash.insert("Ashley", 333);
hash.insert("Katie", 334);
hash.insert("Robert", 14);
println!("The biggest of the elements in the HashMap is {}", bigger(hash));
}
```
And its output
```console
student@ubuntu:~/[[ROOT]]/test$ cargo run
The biggest of the elements in the HashMap is 334
student@ubuntu:~/[[ROOT]]/test$
```