#include <algorithm>
#include <iostream>
#include <thread>
#include <vector>
 
using namespace std;
 
int main()
{
    vector<thread> v;
    v.push_back(thread());
    v.push_back(thread());
    v.push_back(thread());
    for_each(v.begin(), v.end(), [](const thread& t) { cout << t.get_id(); });
}