The 2021 APL Problem Solving Competition: Phase I – Best of Breed

A circle with centre O containing points A, B, C, and D on its circumference. The points are connected to form an inscribed quadrilateral, with diagonals AC and BD intersecting at the circle’s centre.

By Stefan Kruger Stefan works for IBM making databases. He tries to learn at least one new programming language a year, and a few years ago he got hooked on APL and participated in the competition. This is his perspective on some solutions that the judges picked out – call it the “Judges’ Pick”, if […]

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