1423. Maximum Points You Can Obtain from Cards

class Solution:
    def maxScore(self, cardPoints: List[int], k: int) -> int:
        n = len(cardPoints)
        left = k-1
        right = n-1
        curr = sum(cardPoints[:k])
        res = curr
        for _ in range(k):
            curr += cardPoints[right] - cardPoints[left]
            res = max(curr,res)
            left-=1
            right -=1
        return res