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 def check(line): for c in line: if line.count(c) == 1: print(c) return print(-1) for line in sys.stdin.readlines(): check(line.strip())