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
import sys
def do(sentence):
# 转list
l_sentence = [item for item in sentence]
# 循环
for item in l_sentence:
# 遇到只有一个的字符输出
if l_sentence.count(item) == 1:
return item
return -1
if __name__ == '__main__':
sentence = sys.stdin.readline().strip()
r = do(sentence)
print(r)
