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cavityMap.java
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cavityMap.java
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import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;
public class cavityMap {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
int N = scan.nextInt();
scan.nextLine();
String array[][] = new String [N][N];
String s = "";
for(int i = 0;i < N;i++){
s = scan.nextLine();
for(int j = 0; j< N;j++){
array[i][j] = "" + s.charAt(j);
}
}
cavityMarker(array);
for(int x=0;x<N;x++){
for(int y=0;y<N;y++){
System.out.print(array[x][y]);
}
System.out.println("");
}
}
public static void cavityMarker(String array[][]){
for(int i = 1;i<array.length-1;i++){
for(int j = 1;j<array.length-1;j++){
if(!(array[i-1][j].equals("X") || array[i][j-1].equals("X") || array[i][j+1].equals("X") || array[i+1][j].equals("X"))){
if(Integer.parseInt(array[i-1][j]) < Integer.parseInt(array[i][j]) && Integer.parseInt(array[i][j-1]) < Integer.parseInt(array[i][j]) && Integer.parseInt(array[i][j+1]) < Integer.parseInt(array[i][j]) && Integer.parseInt(array[i+1][j]) < Integer.parseInt(array[i][j])){
array[i][j] = "X";
}
}
}
}
}
}