HJ delete the character with the least number of occurrences in the string

Knowledge point ： character string 、 Hash

describe
Delete the least frequent character in the string , If there are multiple characters with the least number of occurrences , Then delete the characters that appear the least . Output the string after deleting these words , The other characters in the string remain in the same order .

Data range ： The length of the input string meets the requirements 1≤n≤20, Ensure that only lowercase letters appear in the input string

Input description ：
String contains only lowercase letters , Illegal input is not considered , The length of the input string is less than or equal to 20 Bytes .

Output description ：
Delete the string after the least frequent character in the string .

Example 1

 Input ：aabcddd
 Output ：aaddd

Cattle guest HJ Python

#  The elapsed time 29ms  Take up memory 4532KB
while True:
    try:
        #  Input 
        str = input()
        dic, res = {
    }, ""
        
        #  Enter each letter into the dictionary 
        for i in str:
            if i in dic:
                dic[i] += 1
            else:
                dic[i] = 1
        
        #  Get in the dictionary   Minimum value 
        min = min(dic.values())
        
        #  Put the minimum   Replace empty 
        for i in str:
            if dic[i] == min:
                str = str.replace(i, "")
        print(str)
    except:
        break

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