Catering is expensive! Workplace team knows exactly how many people
will come into the office on each of the next days. However, the catering
service, for consistency purposes, requires that workplace team order
the same amount of food for each of those days.
Catering costs dollars per person per day. It costs
dollars to feed a
single person pizza on a day where insufficient catering is ordered.
It is not possible to order catering or pizza for a fraction of a person -
either a person eats entirely via catering for the day or via pizza ordered
during that day.
Compute the minimum amount of money that workplace team needs to spend to
feed everyone for the next days.
Constraints
Subtask 1 [1 point]
Subtask 2 [1 point]
No additional constraints.
Input Specification
The first line contains three integers, ,
, and
.
The next line contains integers. The
integer,
, is the
number of people who will be in the office on day
.
Output Specification
Output the minimum cost in dollars that workplace team will need to spend.
Sample Input 1
2 1 100
10 20
Sample Output 1
40
Sample Explanation 1
If workplace team orders catering for 20 people, then it will cost 20 dollars every day, or 40 dollars in total.
Sample Input 2
2 1 1
10 20
Sample Output 2
30
Sample Explanation 2
If workplace team orders no catering and just buys pizza every day, then it will only cost 30 dollars.
Sample Input 3
1 100000 100000
1000000000
Sample Output 3
100000000000000
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