2025-08-21 14:56:20 +0000 UTC

class Solution:
    def minOperations(self, nums: List[int], k: int) -> int:
        enc = [False] * (k + 1)
        res = 0
        rem = k
        for num in reversed(nums):
            res += 1
            if 1 <= num <= k and not enc[num]:
                enc[num] = True
                rem -= 1
                if rem == 0:
                    return res
        raise Exception