def rec(found=None):
    if found is None:
        found = [False]
    n = int(input())
    if n != 0:
        found = [True]
        rec(found)
        if n ** 0.5 == int(n ** 0.5):
            print(n, end=' ')
        return True
    return found[0]


if not rec():
    print(0)