import java.util.*;

class Node {
	int v, next;
	Node(int v, int next) {
		this.v = v; this.next = next;
	}
}

public class Main {
	
	static final int xcnt = 101;
	static final int ycnt = 301;	
	static Node[] list = new Node[xcnt*ycnt];
	static int[] adj = new int[xcnt];
	static int[] ans = new int[ycnt];
	static boolean[] flag = new boolean[ycnt];
	static int n;

	public static void main(String[] args) {
		for ( int i = xcnt*ycnt - 1; i >= 0; i-- ) {
			list[i] = new Node(0, 0);
		}		
		Scanner cin = new Scanner(System.in);
		int kase = cin.nextInt();
		int p, i, j, k, tl;
		boolean fg;
		while ( 0 != kase-- ) {
			p = cin.nextInt();
			n = cin.nextInt();
			tl = 1;
			if (p > n) fg = false;
			else fg = true;	
			Arrays.fill(adj, 0);
			for (i = 1; i <= p; i++) {
				k = cin.nextInt();
				if ( k == 0 ) fg = false;
				while ( 0 != k-- ) {
					j = cin.nextInt();
					list[tl].next = adj[j];
					list[tl].v = j;
					adj[j] = tl++;
				}
			}
			if ( !fg ) {
				System.out.println("NO"); continue;
			}			
			Arrays.fill(ans, 0);
			for ( i = 1; i <= p; i++ ) {
				Arrays.fill(flag, false);
				//if ( !match(i) ) break;
			}
			if ( i <= p ) System.out.println("NO");
			else System.out.println("YES");
		}
	}
｝

• Re:我的更郁闷，只是进行了一个预处理，还没有匹配就RE了，还请大虾指点。（符代码） (1402) xuchen_cug 2006-10-05 10:00:05
• 发现问题所在了，把i写成一j，真是FT，这样的错误还犯！ (1402) archenxu 2006-10-05 10:02:42