TITLE = "HJ7 删除字符串中出现次数最少的字符" def solve(): input_str = input().strip() count_least_char, count_dict = count_least(input_str) result = delete_least_char(input_str, count_least_char, count_dict) print(result) def count_least(s: str) : count_dict = {} for i in range(len(s)): char = s[i] if ch...