You are given an array courses where courses[i] = [duration_i, lastDay_i] indicates that the $i^{ ext{th}}$ course requires duration_i continuous days to complete and must be finished on or before day lastDay_i.

You begin on day $1$ and can only take one course at a time.

Return the maximum number of courses you can finish.

Constraints:

• $1 \leq$ courses.length $\leq 10^4$

• $1 \leq$ duration_i, lastDay_i $\leq 10^4$

Now, let’s take a moment to make sure you’ve correctly understood the problem. The quiz below helps you check if you’re solving the correct problem:

We have a game for you to play. Rearrange the logical building blocks to develop a clearer understanding of how to solve this problem.

Implement your solution in the following coding playground.