P9427 [Lанqiao Cup 2023 National B] Forming Digits

Xiao Lan wants to use $N$ digits $2$ and $M$ digits $3$ to form an integer with $N + M$ digits. Please compute the largest multiple of $2023$ that Xiao Lan can form.

Two integers $N$ and $M$.

An integer with $N + M$ digits, representing the answer. If it is impossible to form a multiple of $2023$, output $-1$.

### Constraints - For $20\%$ of the testdata, $1 \le N, M \le 12$. - For $40\%$ of the testdata, $1 \le N, M \le 100$. - For $60\%$ of the testdata, $1 \le N, M \le 10000$. - For $100\%$ of the testdata, $1 \le N, M \le 1000000$. Final Round of the 14th Lanqiao Cup Software Contest, C/C++ College Group B, Problem I. Translated by ChatGPT 5