백준 2965 캥거루 세마리

https://www.acmicpc.net/problem/2965

2965번: 캥거루 세마리

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());
        int b = Integer.parseInt(st.nextToken());
        int c = Integer.parseInt(st.nextToken());
        int maxVal = Math.max(c- b, b - a);
        System.out.println(maxVal - 1);
    }
}