题解 | #第一个只出现一次的字符#
第一个只出现一次的字符
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# # 代码中的类名、方法名、参数名已经指定,请勿修改,直接返回方法规定的值即可 # # # @param str string字符串 # @return int整型 # class Solution: def FirstNotRepeatingChar(self , str: str) -> int: # write code here for x in str: if str.count(x)>1: continue elif str.count(x)==1: return str.index(x) return -1