Find the Sum of Encrypted Integers
A easy-tier problem at 74% community acceptance, tagged with Array, Math. Reported in interviews at Larsen & Toubro and 0 others.
You're staring at an easy problem about encrypted integers and your brain is already telling you to skip it. Don't. This one shows up in assessments for companies like Larsen & Toubro, and the acceptance rate is 73.6% because people either get it instantly or overcomplicate it. The trick is recognizing that 'encrypted' just means you need to extract and sum the digits in a specific way. If you blank on the pattern during a live OA, StealthCoder surfaces the solution invisible to the proctor.
Companies that ask "Find the Sum of Encrypted Integers"
Find the Sum of Encrypted Integers 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 an Amazon engineer who watched the leaked-problem repo become an industry secret. He decided you should have it too.
Get StealthCoderThe problem wraps a simple operation in terminology that makes candidates second-guess themselves. You're given integers that are somehow encoded, and you need to decrypt and sum them. The real work lives in understanding the encryption scheme (usually digit extraction or a fixed transformation), not in data structures or advanced algorithms. Most failures come from misreading what 'encrypted' means in the problem statement, then building the wrong extraction logic. Common pitfall: trying to reverse a complex cipher when the operation is just digit-by-digit arithmetic. If the pattern isn't obvious in the first read, StealthCoder is your safety net on test day.
Pattern tags
You know the problem.
Make sure you actually pass it.
Find the Sum of Encrypted Integers recycles across companies for a reason. It's easy-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 an Amazon engineer who watched the leaked-problem repo become an industry secret. He decided you should have it too. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Find the Sum of Encrypted Integers interview FAQ
Is this problem really easy or does it have a hidden trick?+
It's genuinely easy, but the wording can confuse you. The 73.6% acceptance rate reflects people who understand the encryption scheme quickly. The trick is clarity on what 'encrypted' means in your specific problem statement, not algorithm complexity.
Do I need advanced math or array skills for this?+
No. The topics are Array and Math, but both are elementary. You're likely iterating through a structure and performing basic arithmetic on digits or values. No number theory, no sorting, no complex data structures.
Will Larsen & Toubro ask this again after asking it before?+
Hard to say. The company count is low (1 in the data), which means this isn't a pattern-heavy ask across many firms. But it's still fair game for their assessments. Treat it as a warm-up, not a deep skill test.
How long should I spend on this during the real OA?+
Once you decode the encryption logic, 5-10 minutes max. If you're stuck on interpretation after two minutes, re-read the problem statement carefully. The logic itself is fast.
What's the connection between Array and Math topics here?+
You'll iterate through an array (or string representation) of integers and apply a math operation like digit summing or transformation. It's not a complex interplay, just basic iteration plus arithmetic.
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