CF873A.Chores

Luba has to do $n$ chores today. $i$ -th chore takes $a_{i}$ units of time to complete. It is guaranteed that for every the condition $a_{i}>=a_{i-1}$ is met, so the sequence is sorted.

Also Luba can work really hard on some chores. She can choose not more than $k$ any chores and do each of them in $x$ units of time instead of $a_{i}$ ().

Luba is very responsible, so she has to do all $n$ chores, and now she wants to know the minimum time she needs to do everything. Luba cannot do two chores simultaneously.

The first line contains three integers $n,k,x (1<=k<=n<=100,1<=x<=99$ ) — the number of chores Luba has to do, the number of chores she can do in $x$ units of time, and the number $x$ itself.

The second line contains $n$ integer numbers $a_{i} (2<=a_{i}<=100)$ — the time Luba has to spend to do $i$ -th chore.

It is guaranteed that , and for each $a_{i}>=a_{i-1}$ .

Print one number — minimum time Luba needs to do all $n$ chores.

In the first example the best option would be to do the third and the fourth chore, spending $x=2$ time on each instead of $a_{3}$ and $a_{4}$ , respectively. Then the answer is $3+6+2+2=13$ .

In the second example Luba can choose any two chores to spend $x$ time on them instead of $a_{i}$ . So the answer is $100·3+2·1=302$ .