2025-08-24 11:42:38 +0000 UTC

class Solution:
    def minimumOperations(self, nums: List[int]) -> int:
        freqs, n = [0] * 101, len(nums)
        for i in range(n):
            freqs[nums[i]] += 1
        res = 0
        for i in range(0, n, 3):
            if max(freqs) == 1:
                return res
            res += 1
            for j in range(i, min(i + 3, n)):
                freqs[nums[j]] -= 1
        return res