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/// hugo dao vang
package bla;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.Scanner;
class Queue {
private int maxSize;
private int [] Array;
private int front , rear;
public Queue(int s){
maxSize = s;
Array = new int[maxSize];
front = -1;
rear = -1;
}
public boolean isEmpty(){
if(this.front == this.rear){
return true;
}
return false;
}
public boolean isFull(){
if(this.rear == this.maxSize-1){
return true;
}
return false;
}
public void Push (int x){
Array[++rear] = x;
}
public int Pop(){
front++;
return Array[front];
}
public void reset(){
front=rear=-1;
}
}
public class Solution {
static int N,G;
static int gold [][];
static int Map [][];
static int map_gold [];
static int vis [][];
static Queue Qx = new Queue(10000000);
static Queue Qy = new Queue(10000000);
static int [] dx = {0,1,0,-1};
static int [] dy = {1,0,-1,0};
public static void BFS(int i,int j){
Qx.reset();
Qy.reset();
resetVis();
Qx.Push(i);
Qy.Push(j);
vis[i][j]=0;
while(!Qx.isEmpty()){
int x = Qx.Pop();
int y = Qy.Pop();
for (int k = 0; k < 4; k++) {
int r = x + dx[k];
int c = y + dy[k];
if(r>0 && c>0 && r <= N && c <= N && Map[r][c] != 0 && vis[r][c] == -1){
Qx.Push(r);
Qy.Push(c);
vis[r][c]= vis[x][y]+1;
}
}
}
}
public static void resetVis(){
for (int i = 1; i <= N; i++) {
for (int j = 1; j <= N; j++) {
vis[i][j] = -1;
}
}
}
public static void main(String[] args) throws FileNotFoundException {
long st = System.currentTimeMillis();
System.setIn(new FileInputStream("input.txt"));
Scanner sc = new Scanner(System.in);
int t = sc.nextInt();
for (int tc = 1; tc <= t; tc++) {
gold = new int [5][2];
Map = new int[21][21];
map_gold = new int [5];
vis = new int [21][21];
N = sc.nextInt();
G = sc.nextInt();
for (int i = 1; i <= G; i++) {
int x,y;
x = sc.nextInt();
y = sc.nextInt();
gold[i][0] = x;
gold[i][1] = y;
}
for (int i = 1; i <= N; i++) {
for (int j = 1; j <= N; j++) {
Map[i][j] = sc.nextInt();
}
}
for (int i = 1; i <= G; i++) {
Map[gold[i][0]][gold[i][1]]=2;
}
int gold_max = 0, time_min = 99999999;
for (int i = 1; i <= N; i++) {
for (int j = 1; j <= N; j++) {
int dem_gold = 0, time_gold = 0;
if(Map[i][j]==1){
BFS(i, j);
for (int q = 1; q <= G; q++) {
if(vis[gold[q][0]][gold[q][1]] != -1){
dem_gold++;
time_gold = Math.max(time_gold, vis[gold[q][0]][gold[q][1]]);
}
}
if(dem_gold > gold_max || dem_gold == gold_max && time_gold < time_min){
gold_max = dem_gold;
time_min = time_gold;
for (int k = 1; k <= 4; k++) {
map_gold[k] = vis[gold[k][0]][gold[k][1]];
}
}
resetVis();
}
}
}
if(gold_max == G){
System.out.println("Case #"+tc);
System.out.println(time_min);
}else if(gold_max == 0){
System.out.println("Case #"+tc);
System.out.println(" -1");
}else{
System.out.println("Case #"+tc);
System.out.println(time_min);
for (int i = 1; i <= G; i++) {
if(map_gold[i] == -1){
System.out.println(gold[i][0]+" "+gold[i][1]);
}
}
}
}
long et = System.currentTimeMillis();
long tt = et - st;
System.out.println(tt+" ms");
}
}
///
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///
Case #1
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Case #3
2
Case #4
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Case #5
3
1 9
Case #6
8
Case #7
2
Case #8
4
Case #9
6
Case #10
1
8 4
Case #11
1
4 3
4 5
6 10
Case #12
1
Case #13
4
6 8
Case #14
6
3 9
Case #15
1
1 7
9 10
7 2
Case #16
1
3 6
Case #17
8
Case #18
1
10 10
Case #19
3
6 8
Case #20
7
Case #21
7
Case #22
2
Case #23
10
Case #24
9
Case #25
2
11 10
10 10
Case #26
6
Case #27
1
2 11
Case #28
1
9 8
Case #29
8
Case #30
3
Case #31
5
Case #32
10
Case #33
12
Case #34
12
Case #35
5
2 2
Case #36
13
Case #37
12
6 10
4 15
Case #38
8
Case #39
3
Case #40
11
Case #41
1
5 14
Case #42
8
Case #43
1
18 14
Case #44
10
Case #45
10
20 13
Case #46
8
18 2
Case #47
7
Case #48
-1
Case #49
11
Case #50
1
17 2
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