Given a grid where each entry is only or , find the number of corner rectangles. Acorner rectangleis distinct s on the grid that form an axis aligned rectangle. Note that only the corners need to hav ...
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Given a list of non-overlapping axis-aligned rectangles rects, write a function pick which randomly and uniformily picks an integer point ...
Given a 2d grid map of '1's (land) and '0's (water), count the number of islands. An island is surrounded by water and is formed by connecting ...
Given n points in the plane that are all pairwise distinct, a "boomerang" is a tuple of points (i ...
Given a 2d grid map of '1's (land) and '0's (water), count the number of islands. An island is surrounded by water and is formed by connecting ...
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A 2d grid map of m rows and n columns is initially filled with water. We may perform an addLand o ...
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character in text at most once. Return the maximum number o ...
