import java.util.Scanner;public class NandM2 { static int n, m; static int[] s; static boolean[] visited; //main 함수 public static void main(String[] args) { Scanner sc = new Scanner(System.in); n = sc.nextInt(); m = sc.nextInt(); s = new int[m]; visited = new boolean[m + 1]; //m+1개 boolean값 dfs(0,1);// depth와 start를 첫번째것 입력 } //재귀로 부..