Code RoomTCP segment reassembly
MediumPrep Room Coding #203

TCP segment reassembly

CodingNetworking & APIsDistributed systemsMid–Senior~25 min

Reassemble a byte stream from out-of-order TCP-style segments. You are given a list of [offset, data] segments where offset is the 0-based byte position and data is a string written starting at that offset. Segments may arrive out of order and may overlap; for any overlapping byte position the FIRST segment to cover it wins (later writes to an already-filled byte are ignored). Return the longest contiguous string starting at offset 0. If offset 0 is never written, return an empty string.

Implement
reassemble(segments: list[list]) → str
Examples
in[[[0,"hel"],[3,"lo"]]]out"hello"
What a strong answer looks like

State your approach and its time/space complexity out loud before you optimize. Handle the edge cases (empty input, duplicates, overflow), and say why you chose this over the brute force. Green tests are the floor, not the grade.

0:00 of about 25 min
InputExpectedGot
[[[0,"hel"],[3,"lo"]]]"hello"not run yetsample