1004. Counting Leaves (30)

Java程式碼：第五個執行點返回非零，如果有大神能夠幫我找到問題所在，我就給他介紹女朋友！

import java.util.TreeMap;
import java.util.Iterator;
import java.util.Scanner;

public class Main {
	public static void main(String[] arg){
		Scanner sc =new Scanner(System.in);
		String    firstLine =sc.nextLine().trim();
		String[] firstLine_arr =firstLine.split(" ");
		int N =Integer.parseInt(firstLine_arr[0]); 
		int M =Integer.parseInt(firstLine_arr[1]); 
		
		if(M==0){
            System.out.println("1");	
            return ;
	    }
		String[] line ;
		map.clear();
		for(int i=0;i<M;i++){
			line =sc.nextLine().trim().split(" ");
			int k =Integer.parseInt(line[1]);
			String[] arr =new String[k];
			for(int j=0;j<k;j++){
				arr[j]=line[j+2];
			}
			map.put(line[0], arr);
		}
        
		
		DFS("01",1);
		
		Iterator<Integer> it = result.keySet().iterator();
		System.out.print("0 ");
		StringBuilder sbd =new StringBuilder();
		while(it.hasNext()){
			int leafCount =result.get(it.next());
			sbd.append(leafCount+" ");
		}
		System.out.println(sbd.toString().trim());
		
	}
	
	public static void dfs(){
		
		
	}
	
	static TreeMap<String,String[]> map   =new TreeMap<String,String[]>();
	static TreeMap<Integer,Integer> result=new TreeMap<Integer,Integer>();
	public static void DFS(String start,int level){
		if(map.containsKey(start)){
			int leafCount =0;
			for(String child :map.get(start)){
				if(!map.containsKey(child)){ 
					leafCount++;
				}
				else{ 
				     DFS(child,level+1);
				}
			}
			if(result.containsKey(level)){
				int previousTotal =result.get(level);
			    result.put(level, leafCount+previousTotal);
			}
			else{
				result.put(level, leafCount);
			}
		}
	}
}
 

C++程式碼（全部通過）：

http://blog.csdn.net/iaccepted/article/details/21289205