题解 | #字符个数统计#
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
x = input()
newlist = []
for char in x:
if ord(char) >= 0 and ord(char) <= 127:
newlist.append(char)
newset=set(newlist)
count = 0
for _ in newset:
count+=1
print(count)
