题解 | 字符个数统计
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
arr = input()
dic = {}
for i in arr:
dic[ord(i)] = dic.get(ord(i),0)
print(len(dic))
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
arr = input()
dic = {}
for i in arr:
dic[ord(i)] = dic.get(ord(i),0)
print(len(dic))
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