P1952 Addition on Mars

Recently, Huanhuan read a book about Mars and got confused by an addition operation. Since her arithmetic skills are limited, she asks you for help. As an excellent programmer, you certainly won’t refuse.

The first line contains the base of the operation $N\left(2 \le N \le 36\right)$. The next two lines contain the characters to be added. Each string has a length of at most $200$ digits and represents a base-$N$ number. The digits include $0$ to $9$ and a to z (representing $10$ to $35$).

Output their sum in base $N$.

Translated by ChatGPT 5