import java.util.*; public class Main { static int n; static int m; static int[][] dirs = {{1, 0}, {-1, 0}, {0, 1}, {0, -1}}; // 四个方向 public static void main(String[] args) { Scanner in = new Scanner(System.in); n = in.nextInt(); m = in.nextInt(); int[][] graph = new int[n][m]; for (int i = 0; i <...