#include <iostream>
#include <algorithm>
#include <vector>
#include <random>
 
 
int main()
{
    std::random_device rd;
    std::mt19937 rng(rd());
    std::uniform_int_distribution<> dist(1,20);
 
    // populatle vector with random number of random numbers
    std::vector<int> data;
    std::generate_n(std::back_inserter(data), dist(rng), [&](){ return dist(rng);});
 
    for (auto x : data)
        std::cout << x << '\n';
 
    return 0;
}

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