#include<stdio.h>
int main()
{
    int n;
    scanf("%d", &n);
    if(n < 0){
        printf("Invalid input");
        return 0;
    }
    int arr[20];
    for(int i = 0; i < n; i++){
        scanf("%d", &arr[i]);
    }
    int result[20];
    int index = 0;
    for (int i = 0; i < n; i++){
        if(arr[i] != 0){
            result[index++] = arr[i];
        }
    }
    while (index =  0){
        result[index++] = 0;
    }
    for(int i = 0; i<n; i++){
        printf("%d", result[i]);
        if(i < n- i) printf(" ")
    }
    return 0;
}