const readline = require('readline');

const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
});
const nums=[]
rl.on('line', function (line) {
    nums.push(line)
    if(nums.length===Number(nums[0])+1){
        nums.shift(); 
        // 先Set去重,然后转换成数组并排序。最后按个输出
        let finalNums=Array.from(new Set(nums)).sort((a,b)=>a-b);
        finalNums.forEach(f=>console.log(f));
        
    }
});