use std::thread::spawn;

use crossbeam_channel::{bounded, Receiver};

type S0 =
    Receiver<Receiver<Receiver<Receiver<Receiver<Receiver<Receiver<Receiver<Receiver<()>>>>>>>>>;
type S1 = Receiver<Receiver<Receiver<Receiver<Receiver<Receiver<Receiver<Receiver<()>>>>>>>>;
type S2 = Receiver<Receiver<Receiver<Receiver<Receiver<Receiver<Receiver<()>>>>>>>;
type S3 = Receiver<Receiver<Receiver<Receiver<Receiver<Receiver<()>>>>>>;
type S4 = Receiver<Receiver<Receiver<Receiver<Receiver<()>>>>>;
type S5 = Receiver<Receiver<Receiver<Receiver<()>>>>;
type S6 = Receiver<Receiver<Receiver<()>>>;
type S7 = Receiver<Receiver<()>>;
type S8 = Receiver<()>;
type S9 = ();

fn main() {
    let main = spawn(move || {
        for _ in 0..LOOPS {
            let (sender_s_0, receiver_s_0) = bounded::<S0>(1);
            let (sender_s_1, receiver_s_1) = bounded::<S1>(1);
            let (sender_s_2, receiver_s_2) = bounded::<S2>(1);
            let (sender_s_3, receiver_s_3) = bounded::<S3>(1);
            let (sender_s_4, receiver_s_4) = bounded::<S4>(1);
            let (sender_s_5, receiver_s_5) = bounded::<S5>(1);
            let (sender_s_6, receiver_s_6) = bounded::<S6>(1);
            let (sender_s_7, receiver_s_7) = bounded::<S7>(1);
            let (sender_s_8, receiver_s_8) = bounded::<S8>(1);
            let (sender_s_9, receiver_s_9) = bounded::<S9>(1);
            sender_s_0.send(receiver_s_1).unwrap();
            let receiver_s_1_bis = receiver_s_0.recv().unwrap();

            sender_s_1.send(receiver_s_2).unwrap();
            let receiver_s_2_bis = receiver_s_1_bis.recv().unwrap();

            sender_s_2.send(receiver_s_3).unwrap();
            let receiver_s_3_bis = receiver_s_2_bis.recv().unwrap();

            sender_s_3.send(receiver_s_4).unwrap();
            let receiver_s_4_bis = receiver_s_3_bis.recv().unwrap();

            sender_s_4.send(receiver_s_5).unwrap();
            let receiver_s_5_bis = receiver_s_4_bis.recv().unwrap();

            sender_s_5.send(receiver_s_6).unwrap();
            let receiver_s_6_bis = receiver_s_5_bis.recv().unwrap();

            sender_s_6.send(receiver_s_7).unwrap();
            let receiver_s_7_bis = receiver_s_6_bis.recv().unwrap();

            sender_s_7.send(receiver_s_8).unwrap();
            let receiver_s_8_bis = receiver_s_7_bis.recv().unwrap();

            sender_s_8.send(receiver_s_9).unwrap();
            let receiver_s_9_bis = receiver_s_8_bis.recv().unwrap();

            sender_s_9.send(()).unwrap();
            receiver_s_9_bis.recv().unwrap();
        }
    });

    main.join().unwrap();
}

static LOOPS: i64 = 100;