fn test(elements: &mut [i32], exit: bool) {
    if exit {
        return
    }
    for element in elements.iter_mut() {
        *element = 1;
        test(elements, true);
        *element = 0;
    }
}

fn main () {
    let mut data = [0, 1, 2];
    test(&mut data, false);
}