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N2292.java
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package baekjun;
import java.util.Scanner;
public class N2292 {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int N = scanner.nextInt();
int now = 1;
int layer = 1;
while(N > now) {
now = now + layer * 6;
layer++;
}
System.out.println(layer);
}
}
//위의 그림과 같이 육각형으로 이루어진 벌집이 있다.
//그림에서 보는 바와 같이 중앙의 방 1부터 시작해서 이웃하는 방에 돌아가면서 1씩 증가하는 번호를 주소로 매길 수 있다.
//숫자 N이 주어졌을 때, 벌집의 중앙 1에서 N번 방까지 최소 개수의 방을 지나서 갈 때
//몇 개의 방을 지나가는지(시작과 끝을 포함하여)를 계산하는 프로그램을 작성하시오.
//예를 들면, 13까지는 3개, 58까지는 5개를 지난다.
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