Tape Scheduling Limits: 5 sec., 1024 MiB Tape storage or magnetic tape data storage is a system that is used for storing digital information on magnetic tape using digital recording. With data volumes growing rapidly worldwide, tape storage is the...-DPDK中文网

以下是一个可能的C++最优解代码示例：

#include <iostream>
#include <vector>
#include <algorithm>

struct Request {
    int wrap;
    double distance;
    int index;

    bool operator<(const Request& other) const {
        return wrap < other.wrap || (wrap == other.wrap && distance < other.distance);
    }
};

double calculateMoveTime(const Request& from, const Request& to) {
    double time = 0.0;

    if (from.wrap != to.wrap) {
        // Change band
        time += 4.0;

        // Change wrap
        time += 1.0;
    }

    // Move to anchor position
    int anchorPosition = static_cast<int>(to.distance / 30.0) * 30;
    
    if ((to.distance - anchorPosition) * (to.distance - from.distance) < 0 && from.wrap == to.wrap) {
        // No need to change direction or move to anchor position
        time += std::abs(to.distance - from.distance) / 2.0;
    } else {
        time += std::abs(anchorPosition - from.distance) / 8.0; // Move to the closest anchor
        time += 2.5; // Penalty for changing direction
        
        if (anchorPosition != to.distance)
            time += std::abs(to.distance - anchorPosition) / 2.0; // Slowly move to the target position
    }

    return time;
}

std::vector<int> optimizeScheduler(std::vector<Request>& requests) {
    std::sort(requests.begin(), requests.end());

    std::vector<int> order(requests.size());
    
	for (int i = 0; i < order.size(); ++i)
		order[i] = i;

	std::stable_sort(order.begin(), order.end(), [&](int a, int b) {
		return calculateMoveTime(requests[a], requests[0]) < calculateMoveTime(requests[b], requests[0]);
	});

    return order;
}

int main() {
    int n;
    std::cin >> n;

    std::vector<Request> requests(n);
    
	for (int i = 0; i < n; ++i) {
        std::cin >> requests[i].wrap >> requests[i].distance;
        requests[i].index = i;
    }

    std::vector<int> optimalOrder = optimizeScheduler(requests);

    for (int index : optimalOrder)
        std::cout << index << " ";
        
    std::cout << std::endl;

    return 0;
}

这段代码中，我们首先定义了一个Request结构体来表示请求的信息，并重载了小于运算符以便排序。然后，我们实现了calculateMoveTime函数来计算从一个位置移动到另一个位置所需的时间。接下来，我们通过对请求进行排序并根据最优调度准则重新排列它们的顺序。最后，我们输出优化后的调度顺序。

请注意，这只是一个可能的解决方案示例，具体实现可能因问题要求、性能和其他因素而有所不同。

内容由零声教学AI助手提供，问题来源于学员提问