import sys inp = input() # print(len(inp)) dic = dict() #字典统计出现的字母次数,这样可以不用讨论用hash表时那些出现次数为0的字母 for word in inp: if word in dic.keys(): dic[word] +=1 else: dic[word] = 1 min_nums = min(dic.values()) #找出最小的次数 a = [] for key,value in dic.items(): #遍历,用个...