Snake's Neck

Remember Violet and Dash from the movie “The Incredibles”? The two siblings recently installed the classic Snake Game in their phones and started competing each other. Soon they got bored and found a new competition in this game. “Let’s find the largest similar contiguous subsequence of our snakes!”. But they got stuck in there. Can you help them?


This is a companion discussion topic for the original entry at https://toph.co/p/snake-s-neck