题解 | #坐标移动#

const rl = require("readline").createInterface({ input: process.stdin });
var iter = rl[Symbol.asyncIterator]();
const readline = async () => (await iter.next()).value;

void (async function () {
    // Write your code here
    // while(line = await readline()){
    //     let tokens = line.split(' ');

    //     // let a = parseInt(tokens[0]);
    //     // let b = parseInt(tokens[1]);
    //     // console.log(a + b);
    // }
    // 第一点是小于等于3  第二点是返回结果要转成逗号分隔
    line = await readline();
    let lineList = line.split(";");
    let filterList = lineList.filter((item) => {
        let posList = ["A", "D", "W", "S"];
        return (
            item.length <=3 &&
            posList.includes(item[0]) &&
            !isNaN(Number(item.slice(1)))
        );
    });
    // console.log(filterList)
    console.log(filterList.reduce(
        (pos, item) => {
            const dir = item[0];
            const dis = Number(item.slice(1));
            switch (dir) {
                case "A":
                    return [pos[0] - dis, pos[1]];
                case "D":
                    return [pos[0] + dis, pos[1]];
                case "W":
                    return [pos[0], pos[1] + dis];
                case "S":
                    return [pos[0],pos[1] - dis];
            }
            
        },
        [0, 0]
    ).join(','))
})();