using System;
using System.Diagnostics;
using System.IO;

class MainClass
{
    static void Main(string[] args)
    {
        int pid = Process.GetCurrentProcess().Id;
        DirectoryInfo taskDir = new DirectoryInfo(String.Format("/proc/{0}/task", pid));
        foreach(DirectoryInfo threadDir in taskDir.GetDirectories())
        {
            int tid = Int32.Parse(threadDir.Name);
            Console.WriteLine(tid);
        }
    }
}