题解 | #坐标移动#

const readline = require('readline');

const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
});
let regx = /^[ASDW]\d{1,2}$/;
let arr = [0, 0];
rl.on('line', function (line) {
    line.split(';').map(item => {
        if (regx.test(item)) {
            let val = item.substr(1);
            let dir = item.charAt(0);
            switch (dir) {
                case 'A':
                    arr[0] -= val;
                    break;
                case 'S':
                    arr[1] -= val;
                    break;
                case 'D':
                    arr[0] += val;
                    break;
                case 'W':
                    arr[1] += val;
                    break;
            }
        }
    })

    console.log(arr.join(','))
});