1750. Minimum Length of String After Del

[흑화뉴비(coderhs)]

class Solution:

    def minimumLength(self, s: str) -> int:

        if len(s) == 1:

            return 1

        if s == s[0] * len(s):

            return 0

        i, j = 0, len(s)-1

        while i < j and s[i] == s[j]:

            x = s[i]

            while x == s[i]: i += 1

            while x == s[j]: j -= 1

        return max(j - i + 1, 0)

왜 Easy가 아닐까?