mediumGoogle Amazon Meta

Gas Station: the greedy circuit problem.

Gas Station rewards spotting a greedy invariant that turns O(n²) into O(n). Two facts carry the whole solution: total feasibility, and that a failed prefix lets you skip every start inside it.

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

Gas Station rewards spotting a greedy invariant that turns O(n²) into O(n). Two facts carry the whole solution: total feasibility, and that a failed prefix lets you skip every start inside it.

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 trackJump Game: can you reach the end of the array (greedy)?Next in this trackLongest Increasing Subsequence (LIS): the O(n log n) patience-sorting trick.Next in this trackMinimum Window Substring: the variable-size sliding window.

DISCUSSION · 0

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