솜씨좋은장씨

코딩 1일 1문제! 오늘의 문제는 백준의 ISBN 입니다. 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 👨🏻‍💻 코드 ( Solution ) def isbn(a, b, c): answer = 91 + a * 1 + b * 3 + c * 1 retu..