题解 | #提取不重复的整数#
提取不重复的整数
https://www.nowcoder.com/practice/253986e66d114d378ae8de2e6c4577c1
num = int(input())
a = set()
out = 0
while num != 0:
k = num %10
num //= 10
if k in a:
continue
else:
a.add(k)
out = out*10 + k
print(out)
