1014. Waiting in Line (30)

Suppose a bank has N windows open for service. There is a yellow line in front of the windows which devides the waiting area into two parts. The rules for the customers to wait in line are:

The space inside the yellow line in front of each window is enough to contain a line with M customers. Hence when all the N lines are full, all the customers after (and including) the (NM+1)st one will have to wait in a line behind the yellow line.
Each customer will choose the shortest line to wait in when crossing the yellow line. If there are two or more lines with the same length, the customer will always choose the window with the smallest number.
Customer[i] will take T[i] minutes to have his/her transaction processed.
The first N customers are assumed to be served at 8:00am.
Now given the processing time of each customer, you are supposed to tell the exact time at which a customer has his/her business done.

For example, suppose that a bank has 2 windows and each window may have 2 custmers waiting inside the yellow line. There are 5 customers waiting with transactions taking 1, 2, 6, 4 and 3 minutes, respectively. At 08:00 in the morning, customer1 is served at window1 while customer2 is served at window2. Customer3 will wait in front of window1 and customer4 will wait in front of window2. Customer5 will wait behind the yellow line.

At 08:01, customer1 is done and customer5 enters the line in front of window1 since that line seems shorter now. Customer2 will leave at 08:02, customer4 at 08:06, customer3 at 08:07, and finally customer5 at 08:10.

Input

Each input file contains one test case. Each case starts with a line containing 4 positive integers: N (<=20, number of windows), M (<=10, the maximum capacity of each line inside the yellow line), K (<=1000, number of customers), and Q (<=1000, number of customer queries).

The next line contains K positive integers, which are the processing time of the K customers.

The last line contains Q positive integers, which represent the customers who are asking about the time they can have their transactions done. The customers are numbered from 1 to K.

Output

For each of the Q customers, print in one line the time at which his/her transaction is finished, in the format HH:MM where HH is in [08, 17] and MM is in [00, 59]. Note that since the bank is closed everyday after 17:00, for those customers who cannot be served before 17:00, you must output "Sorry" instead.

Sample Input
2 2 7 5
1 2 6 4 3 534 2
3 4 5 6 7
Sample Output
08:07
08:06
08:10
17:00

Sorry

IDEA

1.#define INF 0x6FFFFFFF 定义一个很大很大的数

2.定义数据结构Customer记录每个顾客的服务时间和离开时间（初始快离开时间是INF无穷大）

3.vector< queue<int> > winQueue(N);定义每个窗口的排队队列

  vector<int> timeBase(N,0);定义每个窗口的空闲时刻，初始时是0

4.初始时刻8:00进入排队队列的顾客，计算其离开时间，此时窗口无人空闲时刻就等于上一个顾客离开时间

计算后来顾客进入窗口排队队列情况

CODE

#include<iostream>#include<cstdio>#include<vector>#include<queue>#include<fstream>using namespace std;#define INF 0x6FFFFFFFstruct Customer{int process;int leave;};int main(){//freopen("input.txt","r",stdin);int N,M,K,Q;cin>>N>>M>>K>>Q;vector<Customer> cus(K);for(int i=0;i<K;i++){cin>>cus[i].process;cus[i].leave=INF;} vector< queue<int> > winQueue(N);//每个窗口的排队队列 vector<int> timeBase(N,0);//每个窗口基准时间int p; //首次可进入排队状态的 for(p=0;p<N*M&&p<K;p++){cus[p].leave=timeBase[p%N]+cus[p].process;timeBase[p%N]=cus[p].leave;winQueue[p%N].push(p);}//队列之外的，进队状态for(p;p<K;p++){int tmp=INF;int win=-1;for(int i=0;i<N;i++){int top=winQueue[i].front();if(tmp>cus[top].leave){//选出窗口中最早的空闲的时间，进而让对外的人进来排队 win=i;tmp=cus[top].leave;}}cus[p].leave=timeBase[win]+cus[p].process;timeBase[win]=cus[p].leave;winQueue[win].pop();winQueue[win].push(p);} for(int i=0;i<Q;i++){int q;cin>>q;q--;if(cus[q].leave-cus[q].process>=540){cout<<"Sorry"<<endl;}else{printf("%02d:%02d\n",8+cus[q].leave/60,cus[q].leave%60);}} //fclose(stdin);return 0;}