题解 | #提取不重复的整数#
提取不重复的整数
http://www.nowcoder.com/practice/253986e66d114d378ae8de2e6c4577c1
先倒序，后拆开
while True:
try:
a=list(input())[::-1]
b=[]
for num in a:
if num not in b:
b.append(num)
print(''.join(b))
except:
break
