原题：

 

In  a city there are n bus drivers. Also there are n morning bus  routes &nafternoon bus routes with various lengths. Each driver  is assigned one morning route & one evening route. For any driver, if his  total route length for a day exceedsd, he has to be paid overtime for  every hour after the firstd hours at a flat r taka / hour.  Your task is to assign one morning route & one evening route to each bus  driver so that the total overtime amount that the authority has to pay is  minimized.

 

Input

The  first line of each test case has three integers n, d and r,  as described above. In the second line, there arenspace separated integers  which are the lengths of the morning routes given in meters. Similarly the  third line hasnspace separated integers denoting the evening route  lengths. The lengths are positive integers less than or equal to 10000. The  end of input is denoted by a case with three 0 s.

 

Output

For  each test case, print the minimum possible overtime amount that the authority  must pay.

 

Constraints

-           1  ≤ n ≤ 100

-           1  ≤ d ≤ 10000

-           1  ≤ r ≤ 5

 

Sample Input

Output for Sample Input

2 20 5

10 15

10 15

2 20 5

10 10

10 10

0 0 0

50

0

 
 

 

 

分析：

简单贪心——排序

源码：

#include 
     
       #include
      
        int b[110]; int w[110]; using namespace std; int main() {     int n,d,r;     while(scanf("%d%d%d",&n,&d,&r)&&(n!=0||d!=0||r!=0))     {         int i ;         int sum=0;         for(i = 0; i
       
        d)                 sum+=b[i]+w[n-1-i]-d;         }         printf("%d\n",sum*r);     }     return 0; }