题解 | #字符个数统计#
字符个数统计
http://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
s = input()
def cn_str(s):
d = {}
for i in s:
d[i] =1 if i not in d else d[i]+1
return len(d.keys())
print(cn_str(s))
哈希思想字符个数统计
http://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
s = input()
def cn_str(s):
d = {}
for i in s:
d[i] =1 if i not in d else d[i]+1
return len(d.keys())
print(cn_str(s))
哈希思想相关推荐