题解 | #提取不重复的整数#
提取不重复的整数
https://www.nowcoder.com/practice/253986e66d114d378ae8de2e6c4577c1
while True:
try:
s = input()
s1 = "".join(reversed(s))
res = ''
for i in s1:
if i not in res:
res += "".join(i)
print(res)
except:
break
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