COVID hits the palaestra - Iran First Round 2018, P5
Source:
March 6, 2021
combinatoricsCovid-19
Problem Statement
There are numbered seats arranged around a circle in a palaestra. The first person to enter the place would sit on seat number . Since a contagious disease is infecting the people of the city, each person who enters the palaestra would sit on a seat whose distance is the longest to the nearest occupied seat. If there are several such seats, the newly entered person would sit on the seat with the smallest number. What is the number of the seat on which the th person sits?