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('');
        tokens.reverse();
        let new_tokens = Array.from(new Set(tokens));
        let str = new_tokens.join('');

        console.log(str);
    }
}()