hotfix fixed link in header
clean up Euler9
euler 11 and 12, both are incorrect
e14 weak solution. Which starting number, under one million, produces the longest collatz chain?
e11 brute force largest product in grid. fixed error of testing 5 numbers instead of 4
e14 runs in 46 seconds, trying to make it faster w/ lookup table
e14 down to <3s, much cleaner