Dota2 Senate
A medium-tier problem at 49% community acceptance, tagged with String, Greedy, Queue. Reported in interviews at Valve and 0 others.
Dota2 Senate is a medium-difficulty problem that sounds like a game simulation but is actually a greedy queue problem in disguise. It's been asked at Valve and shows up in coding assessments as a test of whether you can translate a messy real-world scenario into a clean algorithmic solution. The acceptance rate sits around 49%, meaning half the candidates who attempt it walk away stuck. Most people either overthink the voting mechanics or miss the greedy insight that makes it trivial. If this problem hits your live OA and you can't see the pattern fast enough, StealthCoder surfaces a working solution in seconds, invisible to the proctor.
Companies that ask "Dota2 Senate"
Dota2 Senate 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 recognizing that you don't need to simulate every vote. Use a greedy approach with a queue or count array: process senators in order and eliminate opponents as you encounter them, only incrementing your own vote count when you can actually cast it. The common mistake is trying to track the actual senate state as it evolves, which gets messy fast. What actually works is a single pass where you greedily remove threats before they vote, using a data structure that lets you process senators in circular order. String manipulation is minimal here; the real work is understanding that greedy elimination preserves optimality. If you've drilled Queue and Greedy problems, the pattern becomes obvious on a second read. If you haven't, StealthCoder is your hedge during the assessment.
Pattern tags
You know the problem.
Make sure you actually pass it.
Dota2 Senate 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. 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.
Dota2 Senate interview FAQ
Is this really just about parsing strings or is there a deeper trick?+
It's about the greedy trick, not string parsing. The string is just the input format. You need to realize that optimal play means eliminating opposing senators before they vote, using a queue or counter approach to process senators circularly. Most candidates get stuck trying to simulate the actual voting process.
How often does this come up in assessments at big companies?+
It's been reported at Valve. Medium-difficulty greedy problems like this are standard at companies doing algorithmic screening. The 49% acceptance rate suggests it's harder than it looks, so interviewers use it to separate candidates who can see the pattern from those who brute-force it.
What's the relationship between the Queue topic and the solution?+
A queue lets you process senators in circular order efficiently. You can simulate eliminations by queueing senators who survive each round and using counters to track pending elimination votes from the other side. It's the cleanest way to implement the greedy approach.
Do I need to handle the circular nature of the senate carefully?+
Yes. The senate is circular, so after the last senator votes, it goes back to the first. A queue makes this trivial: when a senator survives, re-queue them for the next round. Without a queue, you'll get off-by-one errors or logic bugs.
What's the most common mistake candidates make here?+
Trying to remove senators from the string directly or simulating the actual voting process round-by-round. This gets tangled fast. The shortcut is greedy elimination: counter how many senators of each party have pending eliminations, process in order, and skip those with pending votes against them.
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