题解 | #KiKi去重整数并排序#

import java.util.*;
public class Main{
    public static void main(String [] args) {
        Scanner sc = new Scanner(System.in);
        int n;
        n = sc.nextInt();
        int[] arr = new int[n];
        for (int i = 0; i < n; i++) {
            arr[i] = sc.nextInt();
        }
        int max=arr[0];
        for(int i=1;i<n;i++){
            if(max < arr[i]){
                max=arr[i];
            }
        }
        int[] newarr=new int[max+1];
        for(int i=0;i<n;i++){
            newarr[arr[i]]=1;
        }
        for(int i=0;i<max+1;i++){
            if(newarr[i]!=0)
                System.out.print(i+" ");
        }
    }
}