/++ dub.sdl: +/

import std.experimental.all;

​

void main()

{

    auto current = Date(2019, 1, 1);

    auto end = Date(2019, 12, 31);

    size_t total = 0;

​

    while (current <= end)

    {

        auto n = toNum(current);

        if (isPrime(n))

        {

            total++;

            writeln(current.toISOExtString());

        }

​

        current += 1.days;

    }

​

    writeln("Total: ", total);

}

​

int toNum(Date date)

{

    return date.year * 10000 + date.month * 100 + date.day;

}

​

bool isPrime(int n)

{

    for (int i = 2; i * i <= n; i++)

    {

        if (n % i == 0) return false;

    }

    return true;

}

​