프로그래머스 점 찍기 (JAVA)

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

프로그래머스

 

 

 

class Solution {
    public long solution(int k, int d) {
        long answer = 0;
        long standard = (long)d * d;
        for(int i = 0 ; i <= d  ; i += k ){
            long length = i;
            long tempLength = length * length;
            long cnt = ((long)Math.sqrt(standard - tempLength)) / k + 1;
            // System.out.println(length + " " + cnt);
            answer += cnt;
        }
        return answer;
    }
}