Range Minimu Query: Given an array A[1,n] of n ordered objects (such as numbers), a Range Minimum Query (or RMQ) from i to j asks for the position of a minimum element in the sub-array A[i,j]. RMQs can be used to solve the lowest common ancestor problem.
The reasons that we do not eat or recommend shellfish are very similar. Shellfish are bottom feeders and feed on parasites and dead skin, many times from dead animals. They do not have appropriate digestive and filter systems to purify toxins and parasites from their body and flesh.
Seafood You Should and Shouldn't Eat. Simple Rule: Eat big fish mindfully and rarely. Just like birthday cake should be an occasional treat, so should healthy big-fish picks like Alaskan wild-caught salmon. Larger fish take years to reproduce, and chronic overfishing has left many big-fish species in major peril.