Cody

Problem 2193. Mysterious digits operation (easy)

What is this digit operation?

 0    -> 0
 1    -> 9
 121  -> 9
 44   -> 6
 15   -> 5
 1243 -> 7
 ...

Solution Stats

56.95% Correct | 43.05% Incorrect
Last Solution submitted on Nov 12, 2019

Problem Comments