C# - 점 찍기

https://school.programmers.co.kr/learn/courses/30/lessons/140107

프로그래머스

    public long solution01(int k, int d)
    {
        long answer = 0;
        for (long i = 0; i <= d; i += k)
        {
            long maxY = (long)Math.Sqrt(Math.Pow(d, 2) - Math.Pow(i, 2));
            answer += maxY / k + 1;
        }
        return answer;
    }