题解 | #字符个数统计#
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
string = input()
seen = []
for i in string:
if i not in seen:
seen.append(i)
print(len(seen))
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
string = input()
seen = []
for i in string:
if i not in seen:
seen.append(i)
print(len(seen))
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