Get Max Efficiency
Reported by candidates from Expedia's online assessment. Pattern, common pitfall, and the honest play if you blank under the timer.
Expedia sent you 'Get Max Efficiency' in October 2024, and you're staring at it wondering if it's a graph problem, a greedy problem, or something else entirely. The title is deliberately vague, which is typical for Expedia's OAs. The pattern hinges on recognizing what 'efficiency' means in their context, then building the right optimization strategy. StealthCoder sits in your corner if you blank on the implementation, but understanding the core trick now saves you ten minutes of thrashing during the live assessment.
Pattern and pitfall
Without the full problem text, the pattern is likely greedy or dynamic programming, possibly with a graph or array component. Efficiency problems usually ask you to maximize output while minimizing cost or time, or to find the optimal ordering or selection of items. The trap is overthinking it: most Expedia efficiency questions reward a clean greedy approach or a straightforward DP recurrence. Common pitfalls include trying to brute-force when a single pass or priority queue will work, or missing constraints that simplify the problem. When you hit the OA live, read the input format and constraints first. They'll hint at the solution's complexity class. StealthCoder can pull the pattern and scaffold once you describe what you're maximizing and minimizing.
The honest play: practice the pattern, and have StealthCoder ready for the one you didn't see coming.
You can drill Get Max Efficiency cold, or you can hedge it. StealthCoder runs invisibly during screen share and surfaces a working solution in under 2 seconds. The proctor sees the IDE. They don't see what's behind it. Built for the candidate who saw this exact problem leak two days before his OA and wondered if anyone had a play.
Get StealthCoderRelated leaked OAs
You've seen the question.
Make sure you actually pass Expedia's OA.
Expedia reuses patterns across OAs. Built for the candidate who saw this exact problem leak two days before his OA and wondered if anyone had a play. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Get Max Efficiency FAQ
How do I know if it's greedy or dynamic programming?+
Greedy works if each local choice clearly leads to the global optimum with no backtracking. Read the problem once and ask: 'Can I sort or prioritize once and then iterate?' If yes, probably greedy. If you need to consider multiple futures or states, DP. Expedia leans greedy for efficiency problems.
What's the most common efficiency trick in OAs?+
Sorting by a key metric (ratio, rate, deadline) and then a single pass. Second most common is using a heap to always pick the best next option. Rarely is it a full graph search. Check if sorting helps before you code.
How do I prepare in 24 hours if I don't have the full problem?+
Drill two-pointer and greedy array problems on LeetCode. Review 'best time to buy and sell stock' and 'assign cookies' patterns. They're quick and teach the efficiency mindset. Then read the Expedia OA carefully once it starts; don't code until you see the structure.
Is this problem still asked or was it retired after October?+
October 2024 is recent. Expedia rotates OAs, but the pattern itself (optimization with constraints) is evergreen. This specific problem may reappear in different forms. Knowing the trick matters more than memorizing the exact wording.
What's the most common mistake candidates make on Expedia efficiency problems?+
Ignoring the constraints and input bounds. A brute-force solution that's O(n^2) can pass if n is 1000, but fails at n is 100,000. Read constraints. They tell you the intended complexity. Also, candidates often forget to handle ties or edge cases like empty input.