今天,书店老板有一家店打算试营业 customers.length 分钟。每分钟都有一些顾客(customers[i])会进入书店,所有这些顾客都会在那一分钟结束后离开。

在某些时候,书店老板会生气。 如果书店老板在第 i 分钟生气,那么 grumpy[i] = 1,否则 grumpy[i] = 0。 当书店老板生气时,那一分钟的顾客就会不满意,不生气则他们是满意的。

书店老板知道一个秘密技巧,能抑制自己的情绪,可以让自己连续 X 分钟不生气,但却只能使用一次。

请你返回这一天营业下来,最多有多少客户能够感到满意的数量。


示例
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输入:customers = [1,0,1,2,1,1,7,5], grumpy = [0,1,0,1,0,1,0,1], X = 3
输出:16
解释:
书店老板在最后 3 分钟保持冷静。
感到满意的最大客户数量 = 1 + 1 + 1 + 1 + 7 + 5 = 16.
提示
  • 1 <= X <= customers.length == grumpy.length <= 20000
  • 0 <= customers[i] <= 1000
  • 0 <= grumpy[i] <= 1

实现

Rust

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pub struct Solution {}

impl Solution {

    pub fn max_satisfied(customers: Vec<i32>, grumpy: Vec<i32>, x: i32) -> i32 {
        let x = x as usize;
        let mut base: i32 = 0;

        for (i, b) in grumpy.iter().enumerate() {
            if b.eq(&0) {
                base += customers.get(i).unwrap()
            }
        }

        let mut max_increase = 0;
        let mut increase = 0;
        for (i, v) in customers.iter().enumerate() {
            if i < x {
                increase += v * grumpy.get(i).unwrap();
                if i == x - 1 {
                    max_increase = increase;
                }
            } else {
                increase = increase + v * grumpy.get(i).unwrap() - customers.get(i - x).unwrap() * grumpy.get(i - x).unwrap();
                max_increase = max(max_increase, increase);
            }
        }

        base + max_increase
    }
}


#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test() {
        assert_eq!(
            16,
            Solution::max_satisfied(
                vec![1, 0, 1, 2, 1, 1, 7, 5],
                vec![0, 1, 0, 1, 0, 1, 0, 1],
                3,
            )
        );
    }
}

Java

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public class Solution {
    
    public int maxSatisfied(int[] customers, int[] grumpy, int x) {
        int base = 0;
        for (int i = 0; i < customers.length; i++) {
            if (grumpy[i] == 0) {
                base += customers[i];
            }
        }

        int increase = 0;
        for (int i = 0; i < x; i++) {
            increase += customers[i] * grumpy[i];
        }

        int maxIncrease = increase;
        for (int i = x; i < customers.length; i++) {
            increase = increase + customers[i] * grumpy[i] - customers[i - x] * grumpy[i - x];
            maxIncrease = Math.max(maxIncrease, increase);
        }

        return base + maxIncrease;
    }
}