// fuck notohhd donut imma impleme t sracks based on areayss
// https://femboy.beauty/o6T3a

#[derive(Clone, Debug, PartialEq)]
struct Stack<T> {
    size: usize,
    data: Box<[Option<T>]>,
}


impl<T: Copy> Stack<T> {
    pub const MAX_SIZE: usize = 100;
    
    fn new() -> Stack<T> {
        Stack {
            size: 0,
            data: Box::new([None; Stack::<()>::MAX_SIZE]),
        }
    }
    
    fn pop(&mut self) -> T {
        let r = self.data[self.size - 1].unwrap();
        self.size -= 1;
        r
    }
    
    fn push(&mut self, e: T) {
      self.data[self.size] = Some(e);
      self.size += 1;
    }
    
    fn first(&self) -> T {
        self.data[self.size - 1].unwrap()
    }
    
    fn size(&self) -> usize {
        self.size
    }
    
    fn is_empty(&self) -> bool {
        self.size == 0
    }
}


fn main() {
    println!(":)");
    // test comment 3
}