题解 | #找出字符串中第一个只出现一次的字符#
找出字符串中第一个只出现一次的字符
https://www.nowcoder.com/practice/e896d0f82f1246a3aa7b232ce38029d4?tpId=37&tqId=21282&rp=1&ru=/exam/oj/ta&qru=/exam/oj/ta&sourceUrl=%2Fexam%2Foj%2Fta%3Fpage%3D2%26tpId%3D37%26type%3D37&difficulty=undefined&judgeStatus=undefined&tags=&title=
import sys
s = input()
def count(s):
count=0
for x in s:
if s.count(x) != 1:
pass
else:
print(x)
count+=1
break
if count==0:
print(-1)
count(s)
