import java.io.*; import java.util.*; public class Main { public static void main(String[] args) throws Exception { Scanner sc = new Scanner(System.in); while (sc.hasNextLine()) { String s = sc.nextLine(); //将16进制s.substring(2, s.length())转换为10进制 System.out.println(Integer.parseInt(s.substring(2, s.length()), 16)); } } }