题解 | #字符个数统计#
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
# 20240910 s = input() a = '' for i in s: if i not in a: a += i print(len(a))
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
# 20240910 s = input() a = '' for i in s: if i not in a: a += i print(len(a))
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