题解 | #进制转换#

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        fun2();
    }

     public static void fun2(){
        Scanner sc = new Scanner(System.in);
        while(sc.hasNextLine()){
            String s = sc.nextLine();
            System.out.println(Integer.parseInt(s.substring(2),16));
        }
    }
     public static void fun1(){
        Scanner scanner = new Scanner(System.in);
        String s = scanner.nextLine();
        String substring = s.substring(2);
        HashMap<String, Integer> stringInteger = new HashMap<>();
        for (int i=0;i<16;i++){
            if (i<10) {
                stringInteger.put(String.valueOf(i),i);
            }else {
                String str[] = {"A","B","C","D","E","F"};
                stringInteger.put(str[i-10],i);
            }
        }
        double sum=0;
        int index = 0;
        for (int j=substring.length()-1;j>=0;j--){
            String key = String.valueOf(substring.charAt(j));
            Integer integer = stringInteger.get(key);
            int value = integer.intValue();
            sum+=value*Math.pow(16,index);
            index++;
        }
        System.out.println((int)sum);
    }
}