题解 | #字符个数统计#
字符个数统计
http://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
string = input()
ls = []
num = 0
for i in string:
if (i not in ls and ord(i)<=127 and ord(i)>=0):
num += 1
ls.append(i)
else:
continue
print(num)
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