Find the Integer Added to Array II
A medium-tier problem at 32% community acceptance, tagged with Array, Two Pointers, Sorting. Reported in interviews at Mitsogo and 0 others.
Find the Integer Added to Array II is a medium-difficulty array problem with a 32% acceptance rate. It shows up in assessments at companies like Mitsogo, and the low pass rate signals a trick that catches most candidates off guard. The problem asks you to reverse-engineer a value that was added to every element of an array, but the catch is you're working with incomplete or transformed data. If you hit this during a live OA and blank on the enumeration strategy, StealthCoder runs invisibly and surfaces the solution in seconds, no proctor visibility.
Companies that ask "Find the Integer Added to Array II"
Find the Integer Added to Array II is the kind of problem that decides whether you pass. StealthCoder reads the problem on screen and surfaces a working solution in under 2 seconds. Invisible to screen share. The proctor sees nothing. Made by a working Amazon engineer who got tired of watching qualified friends bomb OAs they'd solve cold in an IDE.
Get StealthCoderThe core pattern here is enumeration combined with two-pointer validation. The obvious move is to assume one element and check if the math works across the rest of the array, but you need to be ruthless about which candidates to test. Sorting and two-pointer logic let you narrow down which values are even plausible before committing to a full scan. Most candidates either brute-force every possible integer (too slow) or pick the first element and declare victory without verifying the entire array. The trick is combining enumeration with early termination and sorted order to avoid timeout. This is where StealthCoder becomes your safety net on test day: if the pattern doesn't click during the live assessment, the solution appears and you move on.
Pattern tags
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Find the Integer Added to Array II recycles across companies for a reason. It's medium-tier, and most candidates blank under the timer. StealthCoder is the hedge: an AI overlay invisible during screen share. It reads the problem and surfaces a working solution in under 2 seconds. Made by a working Amazon engineer who got tired of watching qualified friends bomb OAs they'd solve cold in an IDE. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Find the Integer Added to Array II interview FAQ
Why is the acceptance rate so low for a medium problem?+
The enumeration trick isn't intuitive. Most candidates jump straight to brute force or greedy guesses without validating their assumption across the full dataset. The two-pointer validation step is easy to overlook, and a half-correct solution fails on edge cases silently.
Do I need to memorize a specific algorithm for this?+
No. You need to understand sorting, two pointers, and basic enumeration. The insight is recognizing that you can't assume; you must test candidate values systematically. Once you see that pattern, the code is straightforward.
How does this relate to the 'Sorting' topic listed?+
Sorting the array (or a subset of it) lets you use two-pointer techniques to validate whether a candidate integer works. Without sorted order, you can't efficiently rule out bad guesses. Sorting is the enabler, not the main event.
Is this problem still asked at FAANG or similar companies?+
The input data shows only Mitsogo so far. That doesn't mean other companies don't ask it; reporting varies. But the low acceptance rate and medium difficulty suggest it's used as a hard filter in some pipelines, so treat it seriously.
What's the most common mistake candidates make?+
Picking one element, computing a candidate integer, and assuming it works everywhere. You must enumerate likely candidates and validate each one against the full array using two pointers. Skipping validation costs you a wrong answer on the OA.
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