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The Challenge You need to build a simple spreadsheet system called OpenSheet. This is like a mini version of Excel. It must handle cell names (like A1, B2), numbers, and math formulas. The ma
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This is a reported interview question from a openai interview for a swe role reported in 2025.
It covers the following topics: Recursion, Topological Sort, Strings, Stack, Graph, Dfs, Bfs, Graph, Recursion, Sorting, Fast/slow Pointers, Queue, Queue, Stack .
Difficulty rating: Easy