The Algorithm Rounds

Most of Scale AI's coding is practical, but a few rounds look like a textbook question, sometimes in a shared doc with no runner. Getting the raw input into shape is often half the work. Read what you're handed first.

Each problem rests on a standard pattern, such as BFS, a memoized DFS, a counter or a stack. Scale's versions add small rules the textbook skips, like how ties break or what a cycle means. Settle those out loud before you type. A solution that handles the textbook case can still miss the rule your interviewer added, and that's usually where points go. The sections below work through each problem and the extra rule it brings.

Scale AIPremium lesson · Coding round

The 4 Scale AI problems are below.

1. 1A Premium questionCoding · Medium
2. 2A Premium questionCoding · Medium
3. 3A Premium questionCoding · Medium

+ 1 more in this lesson

Each with hints, the follow-up and a tested solution.

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