const readline = require('readline');

const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
});
const nums=[]
let clearNums=[]
rl.on('line', function (line) {
  nums.push(line);
    if(nums.length-1===Number(nums[0])){
        nums.shift();
        clearNums=Array.from(new Set(nums));
        clearNums.sort((a,b)=>{return a-b})
        clearNums.forEach(f=>{
            console.log(f)
        })
    }
});