This thread is to discuss the Hashcode 2021 practice question. We could discuss the scores that we have got as there is no ranking for the practice question.
Here are my scores as of now:
First test set is small. So, you can try everything. For the rest, mostly picking the pizzas with largest ingredients and matching the pizzas such that increase of ingredients is maximum and/or intersection is less. Also, tried partial randomization of the sorted (based on count of ingredients) pizzas array and ran 10-2000 times depending upon the size of test set.