ImJay

[파이썬/Python] 백준 6810번 ISBN 6810번: ISBN The International Standard Book Number (ISBN) is a 13-digit code for identifying books. These numbers have a special property for detecting whether the number was written correctly. The 1-3-sum of a 13-digit number is calculated by multiplying the digits a www.acmicpc.net 문제 The International Standard Book Number (ISBN) is a 13-digit code for identifying bo..