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Knights of the Round Table , 34 chairs

Source: Flanders Math Olympiad 2019 p4

December 24, 2022
combinatorics

Problem Statement

The Knights of the Round Table are gathering. Around the table are 3434 chairs, numbered from 1 to 3434. When everyone has sat down, it turns out that between every two knights there is a maximum of rr places, which can be either empty or occupied by another knight. (a) For each r15r \le 15, determine the maximum number of knights present. (b) Determine for each r15r \le 15 how many sets of occupied seats there are that match meet the given and where the maximum number of knights is present.