[백준] 2292번 : 벌집 - Java(자바)

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

import java.util.Scanner;
public class Main {
    public static void main(String args[]) {
      Scanner s=new Scanner(System.in);
      int n=s.nextInt();
      int a=1;
      int t=1;
      if(n==1) System.out.print(1);
      else{
      while(true){
          if(n<a){
              System.out.format("%d",t);
              break;
          }
          else if(n==a){
              System.out.print(t);
              break;
          }
          a+=6*t;
          t++;
      	 }
      }
   }
}