Maximize Negative Signs
Reported by candidates from Amazon's online assessment. Pattern, common pitfall, and the honest play if you blank under the timer.
You've got an Amazon OA in your inbox from June, and you're seeing a problem called Maximize Negative Signs. This is a math and greedy problem wrapped in a deceptive package. The surface reads like a game or puzzle, but it's really asking you to count and decide. StealthCoder will read the problem statement, extract the constraint, and hand you the pattern while you type. If you blank on the logic under pressure, you have a safety net.
Pattern and pitfall
The core trick is figuring out what 'negative signs' means in context, then recognizing that you're either flipping signs to maximize negatives, or counting operations, or both. Usually these problems boil down to greedy choice: flip the smallest absolute value repeatedly, or pair up negatives in a specific way. The pitfall is over-complicating it. Candidates often try to simulate every flip when a formula exists. StealthCoder cuts through that by showing you the exact input structure and the math pattern. Most Amazon negative-sign problems reduce to sorting by absolute value and applying a fixed operation count, then handling remainder parity. Write the greedy sort first, then the conditional logic for what happens when you run out of flips or have an odd number left.
If this hits your live OA and you blank, StealthCoder solves it in seconds, invisible to the proctor.
You can drill Maximize Negative Signs 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 by an Amazon engineer who would have shipped this the night before his JPMorgan OA if he'd had it.
Get StealthCoderRelated leaked OAs
You've seen the question.
Make sure you actually pass Amazon's OA.
Amazon reuses patterns across OAs. Built by an Amazon engineer who would have shipped this the night before his JPMorgan OA if he'd had it. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Maximize Negative Signs FAQ
Is this a simulation problem or a math problem?+
It's math disguised as simulation. You won't loop through every operation. You'll sort, apply a formula, and handle edge cases. The trick is recognizing that and not coding a loop.
What's the trick with negative signs and absolute values?+
You're usually flipping signs to maximize negatives. Sort by absolute value, flip the smallest one repeatedly, and count how many negatives you end with. If you have odd flips left, one number stays or becomes negative depending on parity.
How do I avoid the common pitfall?+
Don't simulate every flip. Don't loop k times. Use sort and math. If you've got n numbers and k operations, you either flip the smallest abs value k times, or cycle through all of them. Handle the remainder carefully.
Will this take more than 20 minutes to code?+
No. Sort, count, apply parity logic. Five to ten minutes if you see the pattern. Twenty if you're second-guessing. Write greedy first, test with examples, then optimize if needed.
Is this still asked at Amazon in 2024?+
Yes, reported in June 2024. Amazon likes these math and greedy hybrids because they filter for pattern recognition under time pressure. It's a classic signal for problem-solving clarity.