[백준] 2292 : 벌집 - JAVA

문제

https://www.acmicpc.net/problem/2292

2292번: 벌집

 

코드

import java.util.*;
import java.io.*;

class Main {	
	
	public static void main(String args[]) throws Exception{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		long n = Long.parseLong(br.readLine());
		
		int count = 0;
		int range = 1;
		while(true) {
			if(n <= range) {
				count+=1;
				break;
			}
			count += 1;
			range = range + count * 6;
		}
		
		System.out.print(count);
	}

}