[BOJ] 백준 2089 -2진수

[문제]

https://www.acmicpc.net/user/sheep0125

 

 

[소스 코드]

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));
		  long n = Long.parseLong(br.readLine());
		  StringBuilder sb = new StringBuilder();
		  if(n==0) {
			  System.out.println(0);
			  return;
		  }
		  while(n!=1) {
			  sb.append(Math.abs(n%-2));
			  n = (long)(Math.ceil((double)n/-2));
		  }
		  sb.append(1);
		  System.out.println(sb.reverse()); 
	}
}