题解 | 坐标移动

import java.util.HashMap;
import java.util.Map;
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
        while (in.hasNextLine()) { // 注意 while 处理多个 case
            //A 左 x- D 右 x+  W 上 y+  S 下 y-
            long x = 0;
            long y = 0;
            String commandStr = in.nextLine();
            if(commandStr.length() >= 1 && commandStr.length() <= 10*10*10*10){
                Map<String,Long> indexMap = new HashMap<>();
                indexMap.put("A",-1l);
                indexMap.put("D",1l);
                indexMap.put("W",1l);
                indexMap.put("S",-1l);
                String[] commandArr = commandStr.split(";",-1);
                for(int i=0; i<commandArr.length; i++){
                    if(commandArr[i].length() == 0) continue;
                    String starts = commandArr[i].substring(0,1);
                    boolean isStarts = indexMap.containsKey(starts);
                    if(isStarts){
                        String ends = commandArr[i].substring(1);
                        boolean isEnds = ends.matches("\\d{1,}");
                        if(isEnds){
                            long distance = Long.parseLong(ends);
                            if(distance >= 1 && distance <= 99 ){
                                if(starts.equals("A") || starts.equals("D")){
                                    x = x + distance * indexMap.get(starts);
                                }
                                if(starts.equals("W") || starts.equals("S")){
                                    y = y + distance * indexMap.get(starts);
                                }
                            }
                        }
                        
                    }
                }
                System.out.println(x+","+y);
            }
            
        }
    }
}