SDE - Intern

Rafiq loves to play with dominoes. On his birthday his father gifted him ‘N’ piles of dominoes, where each pile contains a positive number of dominoes stacked above.

Rafiq loves to play with piles if they are of equal heights, so his father decides to make changes to the piles. His father wonders for each consecutive window of length ‘K’ what is the minimum cost to make them all of the equal height. Hence his father wants to calculate the cost for each window.

The cost for removing and adding one domino on any pile is one unit.

Determine what is the cost to make all elements equal in a window of size 'K', for all windows of size 'K' in an 'N'-sized array/list 'heights'.

You are given an integer array 'ARR' of size 'N' and an integer 'S'. Your task is to return the list of all pairs of elements such that each sum of elements of each pair equals 'S'.

Note:

Each pair should be sorted i.e the first value should be less than or equals to the second value. 

Return the list of pairs sorted in non-decreasing order of their first value. In case if two pairs have the same first value, the pair with a smaller second value should come first.

He started asking what problem i faced in my project and how i deal with it.

Ninja has been given two sorted integer arrays/lists ‘ARR1’ and ‘ARR2’ of size ‘M’ and ‘N’. Ninja has to merge these sorted arrays/lists into ‘ARR1’ as one sorted array. You may have to assume that ‘ARR1’ has a size equal to ‘M’ + ‘N’ such that ‘ARR1’ has enough space to add all the elements of ‘ARR2’ in ‘ARR1’.

For example:

‘ARR1’ = [3 6 9 0 0]
‘ARR2’ = [4 10]
After merging the ‘ARR1’ and ‘ARR2’ in ‘ARR1’. 
‘ARR1’ = [3 4 6 9 10]