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Sorting & Search
11 problems · Easy to Medium · Binary search and sorting
Sorting and searching are foundational skills that underpin solutions to hundreds of other problems. This track starts with a refresher on sorting and search algorithms, then applies binary search across a range of problem types — from classic sorted array search to rotated arrays, merge problems, and order-statistic queries like Kth Largest and Top K Frequent.
Why it matters:
Binary search is one of the most frequently tested patterns in technical interviews, and it appears in far more contexts than just "search a sorted array." Interviewers use it to test whether candidates can identify implicit sorted structure in a problem and apply logarithmic thinking — a signal of strong algorithmic intuition.
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