Introduction: The Timeless Nature of Algorithms When you crack open a standard Data Structures and Algorithms textbook, it’s easy to assume the contents are products of the digital age. But here’s the kicker: many of these algorithms were devised centuries before computers existed . Take the Euclidean algorithm for finding the greatest common divisor—it dates back to 300 BCE . Or the sieve of Eratosthenes , a method for finding prime numbers, invented around 200 BCE . These aren’t relics; they’r