Problem database last updated: June 20, 2025
4 problems · 0 Easy, 4 Medium, 0 Hard · Ranked #280 of 458
0 Easy
0% · avg 23%
4 Medium
100% · avg 59%
0 Hard
0% · avg 18%
Based on 4 reported problems, Groupon interviews are easier than average - only 0% Hard compared to 18% across all companies. The majority (100%) of questions are Medium difficulty, which is typical for companies that want to see solid fundamentals without excessive trick questions.
Compared to the industry average, Groupon puts unusual emphasis on math (75% of problems, 5.9x the industry average), greedy (50% of problems, 5.9x the industry average), array (100% of problems, 1.7x the industry average). If you're short on time, these are the categories to double down on.
The most common topics are array (100%), math (75%), greedy (50%), binary-search (25%). Problems below are sorted by frequency, the ones at the top are asked most often.
| Problem | Difficulty | Frequency | Topics | |
|---|---|---|---|---|
Sell Diminishing-Valued Colored Balls You have an inventory of different colored balls, and there is a customer that wants orders balls of any color. | Medium | Very Likely | arraymathbinary-search | Solve |
Jump Game II You are given a 0-indexed array of integers nums of length n. You are initially positioned at index 0. | Medium | Likely | arraydynamic-programminggreedy | Solve |
Find the Winner of the Circular Game There are n friends that are playing a game. The friends are sitting in a circle and are numbered from 1 to n in clockwise order. More formally, moving clockwis... | Medium | Likely | arraymathrecursion | Solve |
Insert Delete GetRandom O(1) Implement the RandomizedSet class: | Medium | Likely | arrayhash-tablemath | Solve |
Sell Diminishing-Valued Colored Balls
SolveYou have an inventory of different colored balls, and there is a customer that wants orders balls of any color.
Jump Game II
SolveYou are given a 0-indexed array of integers nums of length n. You are initially positioned at index 0.
Find the Winner of the Circular Game
SolveThere are n friends that are playing a game. The friends are sitting in a circle and are numbered from 1 to n in clockwise order. More formally, moving clockwis...
Frequency scores are based on crowdsourced interview reports. A higher score means the problem has been reported more often in recent Groupon interviews.
Very Likely
75-100%
Likely
50-74%
Sometimes
25-49%
Rare
0-24%
Groupon interviews focus heavily on array, math, greedy problems. If you're short on time, these are the categories to prioritize. The problems on this page are sorted by frequency, so start from the top and work your way down.
Beyond solving problems, practice explaining your approach. Groupon interviewers care about your thought process - how you break down a problem, consider edge cases, and evaluate tradeoffs between solutions. A clean O(n) solution you can explain clearly beats an O(log n) solution you can't articulate.
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Groupon has been reported to ask 4 distinct coding problems. The most common topics are array, math, greedy. 0 are Easy difficulty, 4 are Medium, and 0 are Hard. Problems are sorted by frequency - the ones at the top are asked most often.
Based on 4 reported problems, Groupon interviews are easier than average - only 0% Hard compared to 18% across all companies. 100% of questions are Medium difficulty. Focus on the high-frequency Medium problems first, then work through the Hard ones.
Start with the highest-frequency problems listed on this page. Focus on the core topics: array, math, greedy. Practice solving them under time pressure and explaining your approach out loud. Mock interviews with AI can simulate the real experience.
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