UVa 11235: Frequent values simplified problem statement: You are given an array of integers and a number of queries. Each query is in the form of two positive integers i and j, and your program must print the number of occurances of the most frequently occuring value in the array between indicies i and j, inclusive.
UVa 12532: Interval Product involves a clever application of segment trees. Abridged problem statement: You are given a list of integers and a number of queries. Each query can either change one integer in the list, or ask for the sign of the product between a range of indicies. Print out a string with the answers to all the queries concatenated together.