use std::sync::Arc;
use std::sync::atomic::{AtomicUsize, Ordering};

pub fn main() {

    let count = 4;
    let v1 = vec![Arc::new(AtomicUsize::new(0)); count];

    let mut v2 = vec![];
    for _ in 0..count {
        v2.push(Arc::new(AtomicUsize::new(0)));
    }

    v1[0].store(42, Ordering::SeqCst);
    v2[0].store(42, Ordering::SeqCst);

    println!("{:?}", v1);
    println!("{:?}", v2);

}