题解 | 字符个数统计
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
import sys
str=input()
arr=[ 0 for i in range(0,127)]
# print(arr)
for s in str:
if(ord(s)>=0 and ord(s)<=127):
arr[ord(s)]=1
key=0;
for i in range(0,127):
if(arr[i]==1):
key=key+1
print(key)
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