Recursion

Link to counting example
Link to Factorial
Link to Fibonacci

Things to think about:

Why does count1 give such a different result from count2? (hint: think about stackframes)
Why does Fibonacchi take so much longer for higher value input?

Dynamic Progamming

Climbing Stairs (Video) <----- New stuff here (4/20/20)
Climbing Stairs (Code) <----- New stuff here (4/20/20)
Climbing Stairs (Link to leetcode) -- You may need account. Its free and recommended. <----- New stuff here (4/20/20)