Question

In problem set 4 (Caesar ciphers), for the last part there are two functions to implement: find_best_shifts and find_best_shifts_rec.
What is the difference between the two? Am I to code both of them? Does one use the other?

Answer 1

i am still stuck with build coder .and unable to find the difference between build encoder and build coder.
I think we have to code for both

Answer 2

coder is the function that actually offsets the letters. encoder and decoder use the coder function by passing in shifts (positive shift for encoder, negative shift for decoder).