题解 | #字符个数统计#
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
import sys
str=input()
res=''
count=0
for i in str:
if i not in res:
res+=i
count+=1
print(count)
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
import sys
str=input()
res=''
count=0
for i in str:
if i not in res:
res+=i
count+=1
print(count)
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