Printer Queue(poj 3125)

Description

The only printer in the computer science students' union is experiencing an extremely heavy workload. Sometimes there are a hundred jobs in the printer queue and you may have to wait for hours to get a single page of output. 

Because some jobs are more important than others, the Hacker General has invented and implemented a simple priority system for the print job queue. Now, each job is assigned a priority between 1 and 9 (with 9 being the highest priority, 
and 1 being the lowest), and the printer operates as follows.

• The first job J in queue is taken from the queue.
• If there is some job in the queue with a higher priority than job J, thenmove J to the end of the queue without printing it.
• Otherwise, print job J (and do not put it back in the queue).

In this way, all those importantmuffin recipes that the Hacker General is printing get printed very quickly. Of course, those annoying term papers that others are printing may have to wait for quite some time to get printed, but that's life. 

Your problem with the new policy is that it has become quite tricky to determine when your print job will actually be completed. You decide to write a program to figure this out. The program will be given the current queue (as a list of priorities) as well as the position of your job in the queue, and must then calculate how long it will take until your job is printed, assuming that no additional jobs will be added to the queue. To simplifymatters, we assume that printing a job always takes exactly one minute, and that adding and removing jobs from the queue is instantaneous.

Input

One line with a positive integer: the number of test cases (at most 100). Then for each test case:

• One line with two integers n and m, where n is the number of jobs in the queue (1 ≤ n ≤ 100) and m is the position of your job (0 ≤ m ≤ n −1). The first position in the queue is number 0, the second is number 1, and so on.
• One linewith n integers in the range 1 to 9, giving the priorities of the jobs in the queue. The first integer gives the priority of the first job, the second integer the priority of the second job, and so on.

Output

For each test case, print one line with a single integer; the number of minutes until your job is completely printed, assuming that no additional print jobs will arrive.

Sample Input

31 054 21 2 3 46 01 1 9 1 1 1

Sample Output

125
#include<iostream>using namespace std;const int maxn=100+10;inline int fabs(int k) { return k>0?k:-k; }int main(){int N,n,m,a[maxn],cnt;int st,ed;   //标记打印队列首尾 bool print;cin>>N;while(N--){cin>>n>>m;for(int i=0;i<n;i++)cin>>a[i];    a[m]=-a[m];    //标记出来         st=0;    ed=n;    cnt=0;    while(st!=ed)    {    print=true;    int k=a[st%maxn];            st++;            for(int i=st;i!=ed;i++)            if(fabs(a[i%maxn])>fabs(k))  //如果存在大的，该数往后排             {a[ed%maxn]=k;            ed++;            print=false;            break;            }if(print)  {  ++cnt;   //打印时间增加   if(k<0)  {  cout<<cnt<<endl;  break;  }  }}}return 0;}

本题的启示是，写代码前的思路，过程一定要正确地模拟，才能写出正确的代码。

标记的方法这里运用负数来实现，以省去为每个数字创建一个带标记的数据结构。