[백준] JAVA 2292: 벌집

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

2292번: 벌집

 

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Solution:

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

public class Main {
	public static void main(String[] args) throws IOException {
		
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int N = Integer.parseInt(br.readLine());
		int m = 1;
		int x = 2;
		
		if(N==1) {
			System.out.print(N);
		}
		else {
			while(x <= N) {
				x += 6*m;
				m++;
			}
			System.out.print(m);
		}
		
		br.close();
	}
}

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