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 arr = Array.from(line).reverse()
        let res =[]
        for(let i of arr) {
            if(!res.includes(i)) {
                res.push(i)
            }
        }
       console.log(Number(res.join('')))

    }
}()