Editorial for Primitive Calculator
Remember to use this editorial only when stuck, and not to copy-paste code from it. Please be respectful to the problem author and editorialist.
Submitting an official solution before solving the problem yourself is a bannable offence.
Submitting an official solution before solving the problem yourself is a bannable offence.
Analiz ve Çözüm Yolu
Anahtar gözlem, sonucun en fazla \(N + K\) ondalık basamak içerdiğini fark etmektir. Sütunlarda sadece \(X\) rakamları ve sıfırlar olduğu için kolayca sütun toplaması yapabiliriz.
Analysis and Guide for Solution
The key observation is that the result contains at most \(N + K\) decimal digits. Thus we can simply simulate a columnar addition since in each column we have only digits \(X\) and zeros.