[백준] 분해합 2 (gold 5

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));
        long n=Long.parseLong(br.readLine());
        boolean a=false;
        String strN=String.valueOf(n);
        for(Long i=n-(strN.length()*9); i<=n; i++){
            Long temp=i;
            strN=String.valueOf(temp);
            for(int j=0; j<strN.length(); j++) {
                temp += (strN.charAt(j)-'0');
            }
            if (temp == n) {
                a = true;
                n=i;
                break;
            }
        }
        bw.write(a ? n+"":0+"");
        bw.flush();


    }
}