This is the most basic algorithm you must know. Every tech company expects you to implement binary search correctly in under minutes. The template here is the "standard" template. There are variations (left < right with right = mid), but this one handles the most cases cleanly. If you make off-by-one errors in binary search during an interview, it's a red flag. Practice until you can write it without thinking.
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$ curl repovive.com/roadmaps/maang-interview-prep/binary-search/binary-search-why-this-problem
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