[4673번] Self Number 셀프 넘버 - Method[Java]

https://www.acmicpc.net/problem/4673

package javastudy;
 
import java.util.*;
 
public class Main{
    public static void main(String args[]){
        int d[] = new int [10036]; //d(n) of Constructor(n)
 
        for(int n = 1; n < 10001; n++){
            d[dn(n)] = 1;
            if(d[n] != 1) System.out.println(n);
        }
    }
    
    static int dn(int i){
        int temp = i;
        if(i >= 10000) {
            temp += i/10000;
            i = i % 10000;
        }
        if(i >= 1000){
            temp += i/1000;
            i = i % 1000;
        }
        if(i >= 100){
            temp += i/100;
            i = i % 100;
        }
        if(i >= 10){
            temp += i/10;
            i = i % 10;
        }
        
        return temp += i;
    }
}