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()
length = len(n)
l = [n[i] for i in range(length)]
l = l[::-1]
l2 = []
for j in l:
if j not in l2:
l2.append(j)
s = "".join(l2)
print(s)
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