Please subscribe to the official Codeforces channel in Telegram via the link https://t.me/codeforces_official.
×

Virtual contest is a way to take part in past contest, as close as possible to participation on time. It is supported only ICPC mode for virtual contests.
If you've seen these problems, a virtual contest is not for you - solve these problems in the archive.
If you just want to solve some problem from a contest, a virtual contest is not for you - solve this problem in the archive.
Never use someone else's code, read the tutorials or communicate with other person during a virtual contest.

No tag edit access

The problem statement has recently been changed. View the changes.

×
D. Igor In the Museum

time limit per test

1 secondmemory limit per test

256 megabytesinput

standard inputoutput

standard outputIgor is in the museum and he wants to see as many pictures as possible.

Museum can be represented as a rectangular field of *n* × *m* cells. Each cell is either empty or impassable. Empty cells are marked with '.', impassable cells are marked with '*'. Every two adjacent cells of different types (one empty and one impassable) are divided by a wall containing one picture.

At the beginning Igor is in some empty cell. At every moment he can move to any empty cell that share a side with the current one.

For several starting positions you should calculate the maximum number of pictures that Igor can see. Igor is able to see the picture only if he is in the cell adjacent to the wall with this picture. Igor have a lot of time, so he will examine every picture he can see.

Input

First line of the input contains three integers *n*, *m* and *k* (3 ≤ *n*, *m* ≤ 1000, 1 ≤ *k* ≤ *min*(*n*·*m*, 100 000)) — the museum dimensions and the number of starting positions to process.

Each of the next *n* lines contains *m* symbols '.', '*' — the description of the museum. It is guaranteed that all border cells are impassable, so Igor can't go out from the museum.

Each of the last *k* lines contains two integers *x* and *y* (1 ≤ *x* ≤ *n*, 1 ≤ *y* ≤ *m*) — the row and the column of one of Igor's starting positions respectively. Rows are numbered from top to bottom, columns — from left to right. It is guaranteed that all starting positions are empty cells.

Output

Print *k* integers — the maximum number of pictures, that Igor can see if he starts in corresponding position.

Examples

Input

5 6 3

******

*..*.*

******

*....*

******

2 2

2 5

4 3

Output

6

4

10

Input

4 4 1

****

*..*

*.**

****

3 2

Output

8

Codeforces (c) Copyright 2010-2021 Mike Mirzayanov

The only programming contests Web 2.0 platform

Server time: Sep/22/2021 12:36:02 (h2).

Desktop version, switch to mobile version.

Supported by

User lists

Name |
---|