백준공부/java

[백준] 31472번 갈래의 색종이 자르기 (bronze 3

gomduri43 2024. 3. 12. 18:53

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

public class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(System.out));
        int n=Integer.valueOf(br.readLine());
        bw.write(4*(int)(Math.sqrt(2*n))+" ");
        bw.flush();
    }
}