MathDB
Ambassador's Round Table

Source: 2019 AIME II #5

March 22, 2019
AMCAIMEAIME II

Problem Statement

Four ambassadors and one advisor for each of them are to be seated at a round table with 1212 chairs numbered in order from 11 to 1212. Each ambassador must sit in an even-numbered chair. Each advisor must sit in a chair adjacent to his or her ambassador. There are NN ways for the 88 people to be seated at the table under these conditions. Find the remainder when NN is divided by 10001000.