public/subjects/inv_pyramid/README.md

## inv_pyramid

### Instructions

Create a function named `inv_pyramid` that takes a `string` as an `integer` and returns a vector of `string`s.
This function should create a pyramid structure. Each element of the vector must be a combination of spaces and the string given

### Example

i = 5

```console
[
    " >",
    "  >>",
    "   >>>",
    "    >>>>",
    "     >>>>>",
    "    >>>>",
    "   >>>",
    "  >>",
    " >"
]
```

### Expected Functions

```rust
fn inv_pyramid(v: String, i: u32) -> Vec<String> {}
```

### Usage

Here is a program to test your function

```rust
use inv_pyramid::*;

fn main() {
    let a = inv_pyramid(String::from("#"), 1);
    let b = inv_pyramid(String::from("a"), 2);
    let c = inv_pyramid(String::from(">"), 5);
    let d = inv_pyramid(String::from("&"), 8);

    for v in a.iter() {
        println!("{:?}", v);
    }
    for v in b.iter() {
        println!("{:?}", v);
    }
    for v in c.iter() {
        println!("{:?}", v);
    }
    for v in d.iter() {
        println!("{:?}", v);
    }
}
```

And its output

```console
$ cargo run
" #"
" a"
"  aa"
" a"
" >"
"  >>"
"   >>>"
"    >>>>"
"     >>>>>"
"    >>>>"
"   >>>"
"  >>"
" >"
" &"
"  &&"
"   &&&"
"    &&&&"
"     &&&&&"
"      &&&&&&"
"       &&&&&&&"
"        &&&&&&&&"
"       &&&&&&&"
"      &&&&&&"
"     &&&&&"
"    &&&&"
"   &&&"
"  &&"
" &"
$
```