#include <iostream>
#include <random>
#include <ctime>

int main()
{
// no access to hardware on IDEone, will use time instead
//    std::random_device rd;
//    std::mt19937 rng(rd());
    std::mt19937 rng(std::time(NULL));

    std::uniform_int_distribution<> range1(10, 15);

    for(int n = 0; n < 20; ++n)
        std::cout << range1(rng) << ' ';
    std::cout << '\n';

    std::uniform_real_distribution<> range2(1.5, 1.8);
    for(int n = 0; n < 10; ++n)
        std::cout << range2(rng) << ' ';
    std::cout << '\n';
}