题解 | #提取不重复的整数#

while True:
    try:
        int_numbers = list(str(input()))
        reverse_int_numbers = int_numbers[::-1]
        new_list = []
        a = ''
        for i in reverse_int_numbers:
            if i in new_list:
                continue
            else:
                new_list.append(i)
                a += str(i)
        print(a)
    except:
        break

先将其变为一个列表，然后将列表反序，然后直接用if判断