#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    int n;
    cin>>n;
    int *arr=new int[n];
    int *arr1=new int[n];
    for(int i=0;i<n;i++){
        cin>>arr[i];
    }
    int f=0;
    int i,j;
    for(i=0;i<n;i++){
        
		for(int j=0;j<n;j++){
        	
			if(arr[i]!=arr[j]){
           	 if((arr[i]-arr[j])<=1)
               arr1[f]=arr[i];
    	       f++;
            }
        }
    	 
	}
    cout<<endl;
    for(int i=0;i<n;i++){
        cout<<arr1[i]<<" ";
    }
	return 0;
}