题解 | 删除字符串中出现次数最少的字符

s = input().strip()

frequency = {}

for char in s:
    if char in frequency:
        frequency[char] += 1
    else:
        frequency[char] = 1

char_remove = [char for char,cnt in frequency.items() if cnt == min(frequency.values())]

result = [char for char in s if char not in char_remove]

print(''.join(result))