题解 | #提取不重复的整数#
提取不重复的整数
https://www.nowcoder.com/practice/253986e66d114d378ae8de2e6c4577c1
str1 = input()
list2 = []
for i in range(1,len(str1)):
a = str1[-i]
if a not in list2:
list2.append(a)
if str1[0] != 0 and str1[0] not in list2:
list2.append(str1[0])
print(''.join(list2))
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