• 1 <= n <= 5 * 104

Python源码：

class Solution:

    def lexicalOrder(self, n: int) -> List[int]:

        list_n = []

        for i in range(1, n+1):

            list_n.append(str(i))

        sorted_list = sorted(list_n)

        l = len(sorted_list)

        result = []

        for i in range(l):

            result.append(int(sorted_list[i]))

        return result