继续(3n+1)猜想

def solve(nums):
    nums = list(map(int, nums.split(',')))
    covered = set()
    for n in nums:
        temp = n
        while temp != 1:
            if temp % 2 == 0:
                temp //= 2
            else:
                temp = 3 * temp + 1
            covered.add(temp)
    key_nums = [n for n in nums if n not in covered]
    print(' '.join(map(str, sorted(key_nums, reverse=True))))