题解 | #明明的随机数#

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 len = await readline()
    let arr = []
	// 数字大小大于1小于500，可以利用数组下标来保存记录数值，用空间换时间
    while(len--) {
        let num = await readline()
        arr[num] = true
    }
    for(let i = 0; i < arr.length; i++) {
        if (arr[i]) console.log(i)
    }
}()