题解 | 提取不重复的整数

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 resultSet = new Set();
        let tokensArr = tokens[0].split('').reverse();
        tokensArr.map((item, index) => {
            resultSet.add(item);
        })
        console.log(Array.from(resultSet).join(''))
    }
}()