HJ character count

Knowledge point ： character string 、 Hash

describe
Write a function , Count the number of different characters in the string . The characters are in ASCII Code range (0~127, Include 0 and 127), Line break means end , Not included in the characters . Statistics will not be made for those out of scope . Multiple identical characters count only once
for example , For strings abaca for , Yes a、b、c Three different characters , So output 3.

Data range ：1≤n≤500

Input description ：
Enter a line of string without spaces .

Output description ：
Output Input string The middle range is (0~127, Include 0 and 127) Number of characters .

Example 1

 Input ：abc
 Output ：3

 Input ：aaa
 Output ：1

Cattle guest HJ python3

#  Method 1  28ms
str_list = list(set(input()))    #  Input 、 duplicate removal 、 To list 

#  Start counting 
conut = 0
for i in str_list:
    if 0 <= ord(i) <= 127:    #  Judge ASCII code   Whether it meets the requirements 
        conut += 1
        
print(conut)

#  Method 2  30ms
str_list = list(set(input()))    #  Input 、 duplicate removal 、 To list 

#  Start counting 
res_list = []
for i in str_list:
    if 0 <= ord(i) <= 127:    #  Judge ASCII code   Whether it meets the requirements 
        res_list.append(i)

print(len(res_list))

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