题解 | #整型数组合并#

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 index = 0;
    let str = ""; // 合并后的字符串
    while ((line = await readline())) {
        switch (index) {
            case 0:
            case 2:
                index++;
                break;
            case 1:
            case 3:
                str = str.concat(line," ");
                index++;
                break;
            default:
                break;
        }
    }
    const tokens = str.split(" "); // 合并后的字符串拆成数组
    tokens.sort((a,b)=>(a-b));
    const final = Array.from(new Set(tokens)); // 去重
    
    console.log(final.join(""));
})();