import java.util.Scanner

fun main(args: Array<String>) {
    val read = Scanner(System.`in`)
    val lines = read.nextInt()
    val arr = arrayListOf<Int>()
    while(read.hasNextInt()) {
        var a = read.nextInt()
        if (!arr.contains(a)) {
            arr.add(a)
        }
    }
    arr.sort();
    arr.forEach { 
        println(it)
    }
}