题解 | 小红的字符生成

import sys

result = "a" * int(input())


def transfer_1_time(data):

    if len(data) <= 1:
        return data
    elif data[0] == data[1]:
        return chr(ord(data[0]) + 1) + transfer_1_time(data[2:])
    else:
        return data


while len(result) != 1 and result[0] == result[1]:
    result = transfer_1_time(result)
print(result)