Approximately: 1. Compute the number of possible unique groups of people of 3 from W women and M men with the diversity requirement: at least one man and one woman in the group. 2. Given a string of bars and stars and list of intervals, compute the number of stars between two bars on each interval. 3. Given matrix representing the relation between people, compute groups of people that know each other. 4. Given a graph representing people and edges representing interests that they share, find pair of people sharing most of interests.
