1009 : 각 자리수의 역과 합(Number Reverse)

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.StringTokenizer;
 
public class Main {
    
    public static BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
    
    public static void main(String[] args) throws IOException {
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        
        int original[] = new int [11];
        int i, j;
        int cnt = 0;
        
        for (i = 0; ; i++) {
            original[i] = Integer.parseInt(in.readLine());
            if (original[i] == 0) break;
            cnt++;
        }
        for (i = 0; i < cnt; i++) {
            bw.write(String.format(" %d\n", f(original[i])));
        }
        bw.flush();
    }
 
    private static Object f(int num) throws IOException {
        // TODO Auto-generated method stub
        int sum = 0;
        int flag=0;
        while (num > 0) {
            if(flag==1 || num%10!=0)
            {
                bw.write(String.format("%d", num % 10));
                flag=1;
            }
            
            sum = sum + num % 10;
            num = num / 10;
        }
        return sum;
    }
}
 

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