题解 | 提取不重复的整数
from re import S
import sys
n = input()
n = n[::-1]
l=""
for i in n:
if i not in l:
l = l + i
print(int(l))
from re import S
import sys
n = input()
n = n[::-1]
l=""
for i in n:
if i not in l:
l = l + i
print(int(l))
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