You're given two integer arrays. Modify the arrays with a series of swaps to make them unequal at every index, minimizing the total cost of those swaps. Find that minimum cost.

You're given items with prices and beauty values, and a list of queries representing price limits. For each query, find the item with the highest beauty value whose price is within the limit.

You are given a list of events with start times, end times, and values. Find the two non-overlapping events that maximize the sum of their values.