C# (Coding)
This coding test is designed to assess a candidate's ability to work with C#, data structures, and data manipulation. The test will involve writing code to solve a problem using C# and data structures. The candidate will be expected to demonstrate their knowledge of data structures and data manipulation by writing code that is efficient and effective. The candidate will also be expected to explain their code and provide an explanation of the data structures and data manipulation techniques used.
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Bobby has to do n chores today. i-th chore takes a[i] unit of time to complete. It is guaranteed that for every i, the condition a[i] >= a[i]-1 is met, so the sequence is sorted.
Also, Bobby can work hard on some chores. He can choose no more than k chores and do each in x units of time instead of a[i].
Bobby is very responsible, so he has to do all n chores, and now he wants to know the minimum time he needs to do everything. Bobby cannot do two chores simultaneously.
For example, given that:
k = 2, x = 2 and a = [4, 6, 7, 10]
The function should return 14
Since two chores, 7 and 10, can be done in 2 units of time, thus 2+2+4+6 = 14
