SAN JOSE, Calif. — Researchers at IBM Corp. are creating a prototype for a vast data-storage system built Lego-style with storage-array bricks that can be stacked into a cube-shaped server. Such ...
Can you stack four colored cubes so that each color only shows once on each side? Imagine you have four cubes, whose faces are colored red, blue, yellow, and green. Can you stack these cubes so that ...
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