#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    cin >> n;
    
    int arr[n];
    
    for(int i=0;i<n;i++)
    cin >> arr[i];
    
    int mid=0,low=0,high=n-1;
    
    while(mid<high)
    {
        if(arr[mid]==0 && arr[low]==1)
        {
            swap(arr[mid],arr[low]);
            low++;
            mid++;
        }
    }
    
    for(auto it: arr)
    cout<<it<<" ";
}