题解 | #字符个数统计#
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
import sys
input_data = sys.stdin.read().strip()
def count_unique_characters(s):
uni_str = set()
for i in s:
asc_code = ord(i)
if 0 < asc_code < 127:
uni_str.add(i)
return len(uni_str)
result = count_unique_characters(input_data)
print(result)
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