题解 | #字符个数统计#
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
str1 = input()
m = 0
for i in range(len(str1)):
if str1[i] not in str1[:i]:
m += 1
print(m)
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
str1 = input()
m = 0
for i in range(len(str1)):
if str1[i] not in str1[:i]:
m += 1
print(m)
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