Counting Ones

def solve(____):
    n = int(____)
    count = ____
    factor = ____
    lower = ____
    curr = ____
    higher = ____
    while n // factor != ____:
        lower = n % factor
        curr = (____) % ____
        higher = n // (____)
        if curr == ____:
            count += higher * factor
        elif curr == ____:
            count += higher * factor + lower + ____
        else:
            count += (____) * factor
        factor *= ____
    print(____)