题解 | #提取不重复的整数#
提取不重复的整数
https://www.nowcoder.com/practice/253986e66d114d378ae8de2e6c4577c1
n = input()[::-1]
ls = []
for i in n:
ls.append(i)
len_ls = len(ls)
i = 0
while i < len_ls:
if ls[i] in ls[:i]:
del ls[i]
len_ls -= 1
else:
print(ls[i], end="")
i += 1
