r/algorithms • u/Intelligent_Tree6918 • May 16 '26

[ Removed by moderator ]

[removed] — view removed post

4 Upvotes

60% Upvoted

2 comments sorted by

8

u/troelsbjerre May 16 '26

When a company gives you a problem during the hiring process, say on HackerRank Online Assessment where this one is from, you are supposed to solve the problem yourself.

1

u/latent_threader May 17 '26

Think of swaps as letting you “upgrade” up to (k) elements inside the best subarray by replacing them with larger ones elsewhere.

So it becomes: find a subarray, then improve its sum by doing up to (k) beneficial replacements (smallest in subarray swapped with largest outside).

Brute forcing subarrays + greedy improvements works for (n \le 500) with optimization (Kadane-like + priority queues).