fn main() {
    divan::main();
}

#[divan::bench(args = [1, 2, 4, 8, 16, 32, 64, 128])]
pub fn fibonacci_loop(n: i32) -> i32 {
    let mut a = 0;
    let mut b = 1;
    for _ in 0..n {
        (a, b) = (b, a + b);
    }
    b
}

#[divan::bench(args = [1, 2, 4, 8, 16, 32, 64, 128])]
pub fn fibonacci_fold(n: i32) -> i32 {
    (0..n).fold((0, 1), |(a, b), _| (b, a + b)).1
}