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
    let line = (await readline()).split('').reverse().join('')
    let arr = [...new Set(line)].join('')
    console.log(parseInt(arr))
}()