题解 | #表示数字#

const rl = require("readline").createInterface({ input: process.stdin });

rl.on("line", (line) => {
    let arr = line.split("");
    // console.log(arr)
    let arr2 = arr.slice();  //或者let arr2 = arr.concat();
    arr.forEach((item, index) => {
        // console.log(arr[index])
        if (/[0-9]/.test(+item) && /[\D]/i.test(arr2[index - 1])) {
            arr[index] = "*" + arr[index];
        }
        // console.log(arr[index])
        if (/[0-9]/.test(+item) && /[\D]/i.test(arr2[index + 1])) {
            arr[index] = arr[index] + "*";
        }
        // console.log(arr[index])
    });
    // console.log(arr);
    console.log(arr.join(""));
});