题解 | #字符个数统计#
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
list2=[]
list1=list(input())
for i in list1:
while i not in list2:
list2.append(i)
print(len(list2))
#华为od#
list1=list(input())
for i in list1:
while i not in list2:
list2.append(i)
print(len(list2))
#华为od#
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