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
http://www.nowcoder.com/practice/e896d0f82f1246a3aa7b232ce38029d4
# import sys
while True:
try:
s = input().strip()
f = '-1'
for c in s:
if s.count(c) == 1:
f = c
break
print(f)
except:
# print(sys.exc_info())
break
