AppliedAIPrep logoAppliedAI/Prep
← Coding & DSA / 26
mediumGoogleMetaAmazon

Merge k sorted lists (or streams) efficiently.

Merging k sorted sources is the canonical min-heap problem and a real data-engineering pattern (merging sorted shards/streams). The signal is the heap of k heads giving O(N log k). Here is the answer.

Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.

Merging k sorted sources is the canonical min-heap problem and a real data-engineering pattern (merging sorted shards/streams). The signal is the heap of k heads giving O(N log k). Here is the answer.

Unlock the other 750 answers · ₹2,000 / $25Your progress and mastery stay saved · 6 months · one payment · no auto-renew
UP NEXT ON YOUR JOURNEY
Next in this trackTrapping Rain Water: how much water is trapped between bars?Next in this trackImplement batch normalization (forward pass, train and inference) from scratch.Next in this trackTwo Sum and the hash-map complement pattern.
DISCUSSION · 0

No comments yet — be the first to share your approach.