projecteuler.net/problem=79 Problem 79 - Project Euler The page has been left unattended for too long and that link/button is no longer active. Please refresh the page. projecteuler.net 79번 문제) A common security method used for online banking is to ask the user for three random characters from a passcode. For example, if the passcode was 531278, they may ask for the 2nd, 3rd, and 5th characters;..