题解 | #删除字符串中出现次数最少的字符#

'''
构造字典，字典的键值对为字母及其次数
然后找出出现次数最小的字符
遍历所有的字符，不添加出现次数最小的字符
'''
while True:
    try:
        a = input()
        a_dict = {}
        for k in set(a): # 构建字典
            a_dict[k] = 0
        for i in list(a): # 构建字典
            a_dict[i] += 1
        min_value = min(a_dict.values())
        min_str = []
        for k,v in a_dict.items(): # 找出最小出现次数字符
            if v == min_value:
                min_str.append(k)
        new_chr = ''
        for i in list(a): # 删除最小出现次数字符
            if i not in min_str:
                new_chr += i
        print(new_chr)
    except:
        break