package programmers; import java.util.Arrays; public class Level1substring { public int[] solution(long n) { String s = String.valueOf(n); String reverse = ""; for (int i = s.length() - 1; i >= 0; i--) { reverse = reverse + s.charAt(i); } String[] a = reverse.split(""); System.out.println(a); int[] answer = Arrays.stream(a).mapToInt(Integer::parseInt).toArray(); return answer; } public static void main(String[] args) { Level1substring a = new Level1substring(); System.out.println(a.solution(123)); } }