Question
Under snapshot isolation with first-committer-wins, a transaction must ABORT at commit time if any item it wrote was also written by a transaction that committed during its lifetime (between its start and its commit). Transactions are given as rows [start_ts, commit_ts, write_items] sorted by commit_ts ascending (all commit_ts distinct). Process them in commit order; a transaction commits successfully only if none of its write_items conflict with the write_items of an already-committed transaction whose commit_ts is strictly greater than this transaction's start_ts. Aborted transactions do NOT apply their writes (don't count against later transactions). Return the list of start_ts values of the transactions that successfully COMMIT, in commit order.
first_committer_wins(txns: list[list]) → list[int][[[0,10,["x"]],[5,20,["x"]]]]out[0]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.
Vibe coding: describe the solution in plain language (or narrate it) and the coach grades your approach. Generating runnable code from your description is coming next.