PAT1004 Counting Leaves

 

统计树的每一层上叶子节点的个数 

Sample Input 
2 1 
01 1 02 
Sample Output 
0 1 

 

 

 

#include <iostream>
#include <iomanip>
#include <string>
#include <map>
#include <vector>
using namespace std;


void fun(vector<string> &v, map<string,vector<string>> &MapTree)
{
    vector<string> next;
    int leaf = 0;
    vector<string>::iterator iter = v.begin();
    while(iter != v.end())
    {
        map<string,vector<string>>::iterator iterMap = MapTree.find(*iter);

        if (iterMap != MapTree.end())
        {
            vector<string> vec = iterMap->second;
            if (vec.size() == 0)
            {
                leaf++;
            }
            else
            {
                next.insert(next.end(),vec.begin(),vec.end());   
            }
        }
        else
        {
            leaf++;
        }
        iter++;

    }
    cout<<" "<<leaf;
    if (next.size() == 0)
    {
        return;
    }
    fun(next,MapTree);
}

int main()
{
    map<string,vector<string>> MapTree;
    int N,M;
    cin>>N>>M;
    while(M--)
    {
        string str;
        int K;
        vector<string> VNode;
        cin>>str>>K;
        while(K--)
        {
            string strNode;
            cin>>strNode;
            VNode.push_back(strNode);
        }
        MapTree[str] = VNode;
    }

    map<string,vector<string>>::iterator iter = MapTree.find("01");
    if (iter != MapTree.end())
    {
        vector<string> v = iter->second;
        if (v.size() > 0)
        {
            cout<<"0";
            fun(v, MapTree);
        }
        else
        {
            cout<<"1";
        }
    }
    else
    {
        cout<<"1";
    }

    return 0;
}
 

 

 

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