MathDB
NT bijection

Source: All-Russian MO 2023 Final stage 9.6

April 23, 2023
number theory

Problem Statement

Consider all 100100-digit numbers divisible by 1919. Prove that the number of such numbers not containing the digits 4,54, 5, and 66 is the number of such numbers that do not contain the digits 1,41, 4 and 77.
Back to ProblemsView on AoPS