题解 | 删除字符串中出现次数最少的字符

s = input()
counts = {}
for char in s:
    if char not in counts:
        counts[char] = 0
    counts[char] += 1

min_count = min(counts.values())
result = ""
for char in s:
    if counts[char] > min_count:
        result += char
print(result)