Yes, my plan is:

• 1 push-up on day 201
• 2 push-ups on day 202
• ...
• 99 push-ups on day 299
• 100 push-ups on day 300

I can do more than a handful per day already, but this is just to establish the routine.

I will not commit to adding sit-ups just yet, but if I hit my target then I'll add a new exercise on day 301!