use std::thread;
use std::sync::{Arc, Mutex};
use std::time::Duration;

fn main() {
    let mut data = Arc::new(Mutex::new(vec![1, 2, 3]));
    for i in 0..6 {
        let data = data.clone();
        thread::spawn(move || {
            let mut data = data.lock().unwrap();
            data[i % 3] += 1;
        });
    }

    thread::sleep(Duration::from_millis(50));

    for i in 0..3 {
        println!("{}", data.lock().unwrap()[i]);
    }
}