Complement of Base 10 Integer
A easy-tier problem at 61% community acceptance, tagged with Bit Manipulation. Reported in interviews at Cloudera and 1 others.
Complement of Base 10 Integer is an easy bit manipulation problem asked at Cloudera and Snap with a 61% acceptance rate. You'd think this is a warm-up. It's not a trap, but it tests whether you actually understand how bitwise operations work instead of just pattern-matching solutions. The problem forces you to think about which bits matter and which don't. If you freeze on the live OA, StealthCoder surfaces a working solution in seconds so you can move on.
Companies that ask "Complement of Base 10 Integer"
Complement of Base 10 Integer 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. Built by an engineer at a top-10 tech company who can solve these problems cold but didn't want to trust himself in a 90-minute screen share.
Get StealthCoderThe trick is figuring out the bit mask. Most candidates try to flip all bits and miss that you only flip the bits that represent the number itself. If you have 5 (binary 101), you don't flip leading zeros. You need to find the highest set bit, create a mask with all 1s up to that position, then XOR with the number. Common pitfall: flipping too many bits because you didn't think about the actual bit width of the input. The obvious brute-force (convert to string, flip characters, convert back) works but is slow and error-prone. Bitwise thinking is what separates people who understand the problem from people who just happen to get the right answer. StealthCoder is your hedge for the moment you blank on the mask construction.
Pattern tags
You know the problem.
Make sure you actually pass it.
Complement of Base 10 Integer 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. Built by an engineer at a top-10 tech company who can solve these problems cold but didn't want to trust himself in a 90-minute screen share. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Complement of Base 10 Integer interview FAQ
Is this really easy or is there a trick?+
It's genuinely easy once you get the bit mask idea. The trick isn't hidden. But most people overthink it or use a brute-force approach that works but shows weak understanding. The 61% acceptance rate reflects candidates who fumble the bitwise logic under time pressure.
Why would Cloudera and Snap ask this?+
Bit manipulation is foundational for systems work. These companies deal with data efficiency and bitwise operations come up in real work. They're checking if you think in bits naturally or if you're just memorizing solutions.
What's the relationship between this and other bit manipulation problems?+
This is a building block. It teaches you to think about bit masks, XOR operations, and bit width constraints. If you struggle here, you'll struggle with more complex bitwise problems. Master the mask concept and similar problems click faster.
Should I convert to binary string or use bitwise operations?+
Bitwise operations are faster and cleaner. String conversion works but introduces unnecessary overhead and is harder to reason about under pressure. Learn the bit mask approach so you can solve it in one line.
How do I find the right bit mask quickly?+
Find the position of the highest set bit using bit_length() or log operations, then create a mask with (1 << position + 1) - 1. XOR that mask with your number. The key is understanding why you only flip relevant bits, not all bits.
Want the actual problem statement? View "Complement of Base 10 Integer" on LeetCode →