Activity selection problem

Okay, kiddo. Do you like playing games and doing activities? Great! The activity selection problem is kind of like picking which activities you want to do, but we have to be really good at picking them so that we can do as many activities as possible!

Imagine we have a big list of activities with their start and end times, like playing basketball, drawing in our sketchbook, or playing video games. Each activity takes a certain amount of time, and we can only do one activity at a time. We want to figure out which activities we can do without overlapping each other, so we don't have to cancel any activities.

To solve this problem, we have to be clever and try to pick the activities that take the shortest amount of time, so we have time to do more activities. It's kind of like trying to fit as many toys into a toy box as possible. If we pick the biggest toys first, we might not be able to fit all our other toys in the box!

Sometimes, we might have to skip an activity because it overlaps with another activity, but that's okay. We just have to make sure we pick the activities that give us the most fun and variety!

So, the activity selection problem is all about picking the right activities at the right time so we can have as much fun as possible!