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);
        // 注意 hasNext 和 hasNextLine 的区别
        int[] coordinate = {0, 0};

        while (in.hasNextLine()) { // 注意 while 处理多个 case
            String str = in.nextLine();
            String[] strArr = str.split(";");
            // int[] coordinate = {0,0};

            for (int i = 0; i < strArr.length; i++) {

                String tempStr = strArr[i];

                if (isLegal(tempStr)) {
                    if (tempStr.length() == 0) {
                        continue;
                    } else {

                        char key = tempStr.charAt(0);
                        int displaceDistance = Integer.valueOf(tempStr.substring(1));

                        switch (key) {
                            case 'A':
                                coordinate[0] -= displaceDistance;
                                break;
                            case 'D':
                                coordinate[0] += displaceDistance;
                                break;
                            case 'S':
                                coordinate[1] -= displaceDistance;
                                break;
                            case 'W':
                                coordinate[1] += displaceDistance;
                                break;
                            default:
                                break;
                        }

                    }
                } else {
                    continue;
                }

            }

            System.out.print(coordinate[0] + "," + coordinate[1]);

        }
    }

    public static boolean isLegal(String str) {
        //
        int length = str.length();
        switch (length) {
            case 0:
                return true;
            case 1:
                return false;
            case 2:
                if (str.charAt(0) == 'A' || str.charAt(0) == 'W' || str.charAt(0) == 'S' ||
                        str.charAt(0) == 'D') {
                    if (str.charAt(1) >= '0' && str.charAt(1) <= '9') {
                        return true;
                    } else {
                        return false;
                    }
                } else {
                    return false;
                }
            default:
                if (str.charAt(0) == 'A' || str.charAt(0) == 'W' || str.charAt(0) == 'S' ||
                        str.charAt(0) == 'D') {
                    if (str.charAt(1) >= '1' && str.charAt(1) <= '9') {
                        for (int i = 2; i < str.length(); i++) {
                            if (str.charAt(i) >= '0' && str.charAt(i) <= '9') {
                                continue;
                            } else {
                                return false;
                            }
                        }
                        return true;
                    } else {
                        return false;
                    }
                } else {
                    return false;
                }
        }
    }
}