Initialize Classes

Main.java

+import java.util.*;
+import java.io.IOException;
+
+public class Main{
+  static class Board{
+    public int n;
+    public int m;
+    public ArrayList<Thief> thiefs;
+    public ArrayList<Police> polices;
+
+    public Board(int n, int m){
+      this.n = n;
+      this.m = m;
+      this.thiefs   = new ArrayList<Thief>();
+      this.polices  = new ArrayList<Police>();
+    }
+  }
+  static class Thief{
+    public int x;
+    public int y;
+
+    public Thief(int x, int y){
+      this.x = x;
+      this.y = y;
+    }
+  }
+  static class Police{
+    public int x;
+    public int y;
+
+    public Police(int x, int y){
+      this.x = x;
+      this.y = y;
+    }
+  }
+  public static void main(String[] args) throws IOException, InterruptedException{
+
+  }
+}