题解 | 字符个数统计
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
while True:
try:
n = list(input())
n = filter(lambda x:0<ord(x)<127 , n)
print(len(list(dict.fromkeys(n))))
except:break
#python3#