지도 자동 구축(java)

https://softeer.ai/practice/info.do?idx=1&eid=413 

Softeer

처음 작성한 답안: 면을 기준으로 구한다음 뻘짓거리함.. 어쨋든맞음

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


public class Main
{
    public static void main(String args[]) throws IOException
    {
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        int n = Integer.parseInt(bf.readLine());
        
        int square = 1;
        for(int i = 0; i<n; i++){
            square = square * 4;
        }
        int result = (int) Math.round(Math.pow(Math.sqrt(square) + 1, 2));
        System.out.println(result);
    }
}

두번째 답안: 한 면의 point 를 기준으로 계산

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


public class Main
{
    public static void main(String args[]) throws IOException
    {
       BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
       int n = Integer.parseInt(in.readLine());

       int points = 2;
       for (int i=0; i<n; i++){
           points = points * 2 - 1;
       }
       System.out.println(points * points);
    }
}