n = int(input())
arr = list(map(int, input().split()))

if 0 not in arr:
    print("Invalid input")
else:
    pos = 0
    for i in range(n):
        if arr[i] != 0:
            arr[pos] = arr[i]
            pos += 1
    while pos < n:
        arr[pos] = 0
        pos += 1
    print(*arr)