백준 1598 꼬리를 무는 숫자 나열

https://www.acmicpc.net/problem/1598

1598번: 꼬리를 무는 숫자 나열

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer(br.readLine());
        int a = Integer.parseInt(st.nextToken()) - 1;
        int b = Integer.parseInt(st.nextToken()) - 1;
        System.out.println(Math.abs(a / 4 - b / 4) + Math.abs(a % 4 - b % 4));
    }
}