random_deviceがクソすぎ

D:\learn\random>type test1.cpp
#include <random>
#include <iostream>
using namespace std;

int main()
{
random_device d;
cout << d() << endl;
cout << d() << endl;
cout << d() << endl;
}

D:\learn\random>g++ test1.cpp

D:\learn\random>a
3499211612
581869302
3890346734

D:\learn\random>a
3499211612
581869302
3890346734