Simple test on Rust

main-lpv.rs

pub fn lpv(iter_num: usize, sz: usize) -> usize {
    let sums: Vec<_> = (0..iter_num)
        .map(|_| {
            let x: Vec<_> = (0..sz).map(|i| i).collect();
            let y: Vec<_> = x.iter().zip(x.iter().skip(1)).map(|(x, y)| x + y).collect();
            (0..sz).step_by(100).map(|i| y[i]).sum()
        })
        .collect();
    *sums.last().unwrap()
}

fn main() {
    println!("{:?}", lpa(20, 1000000));
}