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
s = input()
mark = 0
for c in s:
if s.count(c) == 1:
print(c)
break
mark += 1
if mark == len(s):
print(-1)
找出字符串中第一个只出现一次的字符
https://www.nowcoder.com/practice/e896d0f82f1246a3aa7b232ce38029d4
s = input()
mark = 0
for c in s:
if s.count(c) == 1:
print(c)
break
mark += 1
if mark == len(s):
print(-1)
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