2017华为机试题--任务调度

题目描述：输入5个任务的ID，任务优先级，开始运行时间和任务运行时间，其中调度过程支持抢占，即优先级值高的任务可抢占正在运行的优先级值低的任务，最后输出前200秒，任务的调度过程

输入描述：任务信息输入格式为：[任务ID.任务优秀级.任务开始运行时间.任务运行时长]；任务与任务之间使用“|”隔离；5个任务的任务ID为1-5；任务优先级范围为0-200.

输入例子：[1.80.1.10]|[2.20.11.15]|[3.50.21.10]|[4.120.31.10]|[5.100.41.10]

输出例子：0.1|1.10|2.10|3.10|4.10|5.10|2.5|0.144

代码如下：

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class add3 {
    public static void main(String[] args) {
        String line = new Scanner(System.in).nextLine();
        String[] strTasks = line.split("\\|");
        List<Task> lst = new ArrayList<Task>();
        for(int i = 0; i < strTasks.length; i++) {
            String[] cs = strTasks[i].substring(1, strTasks[i].length() - 1).split("\\.");
            int id = Integer.parseInt(cs[0]);
            int p = Integer.parseInt(cs[1]);
            int start = Integer.parseInt(cs[2]);
            int allTime = Integer.parseInt(cs[3]);
            lst.add(new Task(id, p, start, allTime));
        }
        
        List<Integer> queue = new ArrayList<Integer>();
        for(int i = 0; i < 200; i++) {
            Task currentTask = null;
            for(Task task : lst) {
                if(task.start <= i && task.left > 0) {
                    if(currentTask == null || task.p > currentTask.p)
                        currentTask = task;
                }
            }
            if(currentTask == null)
                queue.add(0);
            else {
                queue.add(currentTask.id);
                currentTask.left--;
            }
        }
//        System.out.println(lst);
//        System.out.println(queue);
        int current = queue.get(0), cnt = 1;
        List<Result> results = new ArrayList<Result>();
        for(int i = 1; i < queue.size(); i++) {
            if(queue.get(i) != current) {
                results.add(new Result(current, cnt));
                current = queue.get(i);
                cnt = 1;
            } else cnt++;
        }
        results.add(new Result(current, cnt));
        boolean first = true;
        for(Result r : results) {
            if(first) {
                System.out.print(r);
                first = false;
            } else {
                System.out.print("|" + r);
            }
        }
        System.out.println();
    }
}
// [1.80.1.10]|[2.20.11.15]|[3.50.21.10]|[4.120.31.10]|[5.100.41.10]
class Task {
    int id;
    int allTime;
    int left;
    int start;
    int p;
    Task(int id, int p, int start, int allTime) {
        this.id = id;
        this.p = p;
        this.start = start;
        this.allTime = allTime;
        this.left = allTime;
    }
    public String toString() {
        return "[id=" + id + ", allTime=" + allTime + ", left=" + left + ", start=" + start + ", p=" + p + "]";
    }
}
class Result {
    int x, y;
    Result(int x, int y) {
        this.x = x;
        this.y = y;
    }
    public String toString() {
        return x + "." + y;
    }
}