MathDB
soccer tournament

Source: imar test 2006

April 21, 2007
combinatorics proposedcombinatorics

Problem Statement

A number of n>m1n > m \geq 1 soccer teams play a full tournament, each team meeting (once) each other. Points are awarded: 22 for a victory, 11 for a tie and 00 for a loss. At the end, each team has won half of its points against the mm teams placed last (including each of these teams, who won half of its points against the other m1m-1). Find all possible values for nn and mm, supported with examples of such tournaments.