MathDB

456

Part of 1987 All Soviet Union Mathematical Olympiad

Problems(1)

ASU 456 All Soviet Union MO 1987 9 or 10 of 33 knights in night guard

Source:

8/7/2019
Every evening uncle Chernomor (see Pushkin's tales) appoints either 99 or 1010 of his 33 "knights" in the "night guard". When it can happen, for the first time, that every knight has been on duty the same number of times?
combinatoricsalgebra