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
str=input()
a=[]
for i in str:
if str.count(i)==1:
a.append(i)
if len(a)==0:
print(-1)
else:
print(a[0])
a=[]
for i in str:
if str.count(i)==1:
a.append(i)
if len(a)==0:
print(-1)
else:
print(a[0])