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
while True:
try:
S=input()
res=""
for i in S:
if S.count(i)==1:
res=i
break
if res:
print(res)
else:
print(-1)
except:
break
try:
S=input()
res=""
for i in S:
if S.count(i)==1:
res=i
break
if res:
print(res)
else:
print(-1)
except:
break
