rust exercise: inv_pyramid

subjects/inv_pyramid/README.md

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+## inv_pyramid
+
+### Instructions
+
+Create a function called `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: &str, i: u32) -> Vec<&str> {}
+```
+
+### Usage
+
+Here is a program to test your function
+
+```rust
+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
+student@ubuntu:~/[[ROOT]]/test$ cargo run
+" #"
+" a"
+"  aa"
+" a"
+" >"
+"  >>"
+"   >>>"
+"    >>>>"
+"     >>>>>"
+"    >>>>"
+"   >>>"
+"  >>"
+" >"
+" &"
+"  &&"
+"   &&&"
+"    &&&&"
+"     &&&&&"
+"      &&&&&&"
+"       &&&&&&&"
+"        &&&&&&&&"
+"       &&&&&&&"
+"      &&&&&&"
+"     &&&&&"
+"    &&&&"
+"   &&&"
+"  &&"
+" &"
+student@ubuntu:~/[[ROOT]]/test$
+```