题目描述

题解思路

题目所求结果存在下述等式

• 可获得的最大点数 = 所有卡牌的点数之和 - 长度为（卡牌数量 - k）的窗口的点数之和的最小值

我们遍历长度为（卡牌数量 - k）的窗口，记录窗口内的所有点数之和的最小值

题解代码

impl Solution {
    pub fn max_score(card_points: Vec<i32>, k: i32) -> i32 {
        let k = card_points.len() - k as usize;

        let mut sum = 0;
        for i in 0..k {
            sum += card_points[i];
        }

        let mut min_win = sum;

        let mut win = sum;

        for i in k..card_points.len() {
            sum += card_points[i];
            win += card_points[i] - card_points[i-k];
            min_win = min_win.min(win);
        }

        sum - min_win
    }
}

题目链接

https://leetcode.cn/problems/maximum-points-you-can-obtain-from-cards/