Dennis (AKA )is famous for his bad behaviour. This time he tries sneak into Wilson uncle's home through a window. Anyhow he is not tall enough. Dennis asked you help him to calculate the max sum Of brick sizes so he can use them to reach to the window.
Assuming that you are given bricks sizes as Integers in an Array, You have to calculated max size with exactly N bricks.
In Other words
Given an array Of integers and number)find the maximum value that can be calculated by summing exactly N numbers.
Example
InputArray- [10, , 5, 20, 4] output- 31
Expl anation
You have to find the max sum which can be calculated using 2 numbers in the array. 11 + 20 31
Input Format
First line is a String with with spaces Second line is an Integer
Constraints
1 < N Array.length Output Format Integer
Sample Input O
3
Sample Output O
22
