题解 | #提取不重复的整数#
提取不重复的整数
http://www.nowcoder.com/practice/253986e66d114d378ae8de2e6c4577c1
l = 0
r = len(n) - 1
hash = {}
res_list = []
while r >= l:
# print(n[r])
if n[r] not in hash:
hash[n[r]] = r
res_list.append(n[r])
r -= 1
res = "".join(res_list)
print(res)
