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

fn main() {
    let counter = Arc::new(Mutex::new(0));
    let mut handles = vec![];

    for i in 0..5 {
        let counter_clone = Arc::clone(&counter);
        let handle = thread::spawn(move || {
            let mut num = counter_clone.lock().unwrap();
            *num += 1;
            println!("Thread {} incremented counter to: {}", i, *num);
            // Simulate some work
            thread::sleep(Duration::from_millis(50));
        });
        handles.push(handle);
    }

    for handle in handles {
        handle.join().unwrap();
    }

    println!("Final counter value: {}", *counter.lock().unwrap());
}