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dsa3 min read

Find the Kth smallest element in an n×n row-and-column sorted matrix using binary search on value range or heap.

March 19, 2026Read →

dsa2 min read

Find K pairs (u, v) with smallest sums from two sorted arrays using a min-heap initialized with first row candidates.

March 19, 2026Read →

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Find the nth ugly number (only prime factors 2, 3, 5) using three pointers for the 2x, 3x, 5x merge streams.

March 19, 2026Read →

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Maximize courses taken within deadlines by greedily scheduling and swapping out the longest past course.

March 19, 2026Read →

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Find minimum conference rooms required by tracking room end times with a min-heap of ongoing meeting endings.

March 19, 2026Read →

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