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())) {
        const n = line.length;
        var final = [];
        for (let i = n - 1; i >= 0; i--) {
            if (final.some((item) => item === line[i])) continue;
            else final.push(line[i]);
        }
        console.log(final.join(""));
    }
})();