import java.util.Scanner;// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {public static void main(String[] args) {Scanner scan = new Scanner(System.in);int N = scan.nextInt();int[] arr = new int[N];for (int i = 0; i < N; i++) {int n = scan.nextInt();arr[i] = n;}int count = getSortArr(arr);int i = 0;while (i < count) {System.out.println(arr[i]);i++;}}public static int getSortArr(int[]src) {//插入排序for (int i = 1; i < src.length; i++) {int temp = src[i];int j = 0;for (j = i - 1; j >= 0 && temp < src[j]; j--) {src[j + 1] = src[j];}src[j + 1] = temp;}//双指针去重int slow = 0, fast = 1;while (slow < fast && fast < src.length) {if (src[slow] == src[fast]) {fast++;continue;}slow++;src[slow] = src[fast];fast++;}return slow + 1;//有效长度}}