I've been stuck on this question for a while (https://code.google.com/codejam/contest/635101/dashboard#s=p2).
In the analysis of the question (https://code.google.com/codejam/contest/635101/dashboard#s=a&a=2) I understand that K is the rank of N in the set S and it will always be the largest and end number.
However, it says "Suppose there are K' numbers in S'". But since K is the rank of the number, wouldn't it be the same as K'?
It seems S' has a different amount of numbers than S? Is that right?