题目描述

You are given two integers, $a$ and $b$. You concatenate all the numbers in the range $[a, b]$ in an order that produces the largest possible number, $x$.

You are given $q$ queries of the form: $k$ --- what is the $k$-th digit of $x$?

The digits of $x$ are $0$-indexed, starting with the most significant one.

It is guaranteed that the length of $x$ will be at least $k + 1$.

输入格式

The first line contains two integers $a$ and $b$ ($0 < a \leq b \leq 10^{17}$).

The second line contains one integer $q$ ($1 \leq q \leq 5 \cdot 10^4$).

The third line contains $q$ integers $k_1, k_2, \dots, k_q$ ($0 \leq k_i \leq 2 \cdot 10^{18}$), representing the queries. It is guaranteed that all answers exist.

输出格式

The only line of the output should contain a string of length $q$, where the $i$-th character will be the answer to the $i$-th query.

8 13
4
0 3 8 9

9310

提示

• ($4$ points): $b - a \leq 7$;
• ($4$ points): $len(a) = len(b)$;
• ($10$ points): $b - a \leq 100000$
• ($33$ points): $q \leq 30$;
• ($23$ points): $q \leq 1\,000$;
• ($16$ points): $q \leq 10\,000$;
• ($10$ points): no further restrictions.