题解 | #提取不重复的整数#
提取不重复的整数
https://www.nowcoder.com/practice/253986e66d114d378ae8de2e6c4577c1
import sys
#for line in sys.stdin:
# a = line.split()
# print(int(a[0]) + int(a[1]))
s=input()
s=s[::-1]
L=[]
for i in s:
if i not in L:
L.append(i)
print("".join(L))
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