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 = reversed(input())
record = []
for chr in n:
if chr not in record:
record.append(chr)
# while record[-1] == '0':
# record.pop()
print(''.join(record))
