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 n = await readline()
    let arr = []
    while(num = await readline()){
       !arr.includes(num) && arr.push(num) 
    }
    // arr = Array.from(new Set(arr))
    arr.sort((a, b) => a - b)
    arr.forEach(el => console.log(el))
}()