The participants need to be grouped into teams where each team has exactly two candidates. there are n candidates, where each candidate has a skill denoted by skillfi). a total of (n/2) teams are to be formed, such that the total skill of each tefm is the same. the efficiency of a team is defined as the product of the skill levels of its two members, i.e., for the skills [1, 31, the efficiency of the team is 1 * 3