题解 | 坐标移动

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String str = in.next();
        String[] strings = str.split(";");
        int x = 0;
        int y = 0;
        for (int i =0; i<strings.length; i++) {
            if (strings[i].length() < 2 || strings[i].length() >3) continue;  //一位数、空字符或大于三位
            char dir = strings[i].charAt(0);
            //判断剩下的字符是否全是数字
            boolean isDig = true;
            for (int j = 1; j < strings[i].length(); j++) {
                if (!Character.isDigit(strings[i].charAt(j))) {
                    isDig = false;
                }
            }
            if (!isDig) continue;

            int nums = Integer.parseInt(strings[i].substring(1));
            if (dir == 'A') {  //左
                x = x - nums;
            } else if (dir == 'D') {
                x = x + nums;
            } else if (dir == 'W') {
                y = y + nums;
            } else if (dir == 'S') {
                y = y - nums;
            }
        }

        System.out.print(x + "," + y);
    }
}