E. Garden
time limit per test
2 seconds
memory limit per test
256 megabytes
standard input
standard output

Vasya has a very beautiful country garden that can be represented as an n × m rectangular field divided into n·m squares. One beautiful day Vasya remembered that he needs to pave roads between k important squares that contain buildings. To pave a road, he can cover some squares of his garden with concrete.

For each garden square we know number a i j that represents the number of flowers that grow in the square with coordinates (i, j). When a square is covered with concrete, all flowers that grow in the square die.

Vasya wants to cover some squares with concrete so that the following conditions were fulfilled:

  • all k important squares should necessarily be covered with concrete
  • from each important square there should be a way to any other important square. The way should go be paved with concrete-covered squares considering that neighboring squares are squares that have a common side
  • the total number of dead plants should be minimum

As Vasya has a rather large garden, he asks you to help him.


The first input line contains three integers n, m and k (1 ≤ n, m ≤ 100, n·m ≤ 200, 1 ≤ k ≤ min(n·m, 7)) — the garden's sizes and the number of the important squares. Each of the next n lines contains m numbers a i j (1 ≤ a i j ≤ 1000) — the numbers of flowers in the squares. Next k lines contain coordinates of important squares written as " x y" (without quotes) (1 ≤ x ≤ n, 1 ≤ y ≤ m). The numbers written on one line are separated by spaces. It is guaranteed that all k important squares have different coordinates.


In the first line print the single integer — the minimum number of plants that die during the road construction. Then print n lines each containing m characters — the garden's plan. In this plan use character "X" (uppercase Latin letter X) to represent a concrete-covered square and use character "." (dot) for a square that isn't covered with concrete. If there are multiple solutions, print any of them.

3 3 2
1 2 3
1 2 3
1 2 3
1 2
3 3
4 5 4
1 4 5 1 2
2 2 2 2 7
2 4 1 4 5
3 2 1 7 1
1 1
1 5
4 1
4 4