UVa1220 Party at Hali-Bula

#include <iostream>    
#include <stdio.h>    
#include <cmath>    
#include <algorithm>    
#include <iomanip>    
#include <cstdlib>    
#include <string>    
#include <memory.h>    
#include <vector>    
#include <queue>    
#include <stack>    
#include <map>  
#include <set>  
#include <ctype.h>    
#define INF 1000000  
#define ll long long
#define min3(a,b,c) min(a,min(b,c))
  
using namespace std;  

vector<int> rel[210];

bool mul[210][2];

int fun(int x,bool f){
	cout<<x<<endl;
	if(rel[x].size()==0){
		return f;
	}else{
		if(f){
			int re=1;
			for(int i=0;i<rel[x].size();i++){
				re+=fun(rel[x][i],0);
				if(mul[rel[x][i]][0])mul[x][1]=true;
			}
			return re;
		}else{
			int re=0;
			for(int i=0;i<rel[x].size();i++){
				int tmp0=fun(rel[x][i],0);
				int tmp1=fun(rel[x][i],1);
				re+=max(tmp0,tmp1);
				if(tmp0==tmp1)mul[x][0]=true;
				if(tmp0>tmp1&&mul[rel[x][i]][0])mul[x][0]=true;
				if(tmp0<tmp1&&mul[rel[x][i]][1])mul[x][0]=true;
			}
			return re;
		}
	}
}

int main(){
	int n;
	while(cin>>n){
		if(!n)break;
		
		for(int i=1;i<=n;i++)rel[i].clear();
		memset(mul,0,sizeof(mul));
		
		set<string> emp;
		map<string,int> m;
		string bigboss;
		cin>>bigboss;
		emp.insert(bigboss);
		m[bigboss]=1;
		
		
		int cnt=1;
		for(int i=1;i<n;i++){
			string e,b;
			cin>>e>>b;
			if(!emp.count(e)){
				emp.insert(e);
				m[e]=++cnt;
			}
			if(!emp.count(b)){
				emp.insert(b);
				m[b]=++cnt;
			}
			
			rel[m[b]].push_back(m[e]);
		}
		
		bool flag=false;
		int tmp0=fun(1,0);
		int tmp1=fun(1,1);
		if(tmp0==tmp1)flag=true;
		if(tmp0>tmp1&&mul[1][0])flag=true;
		if(tmp0<tmp1&&mul[1][1])flag=true;
		
		cout<<max(tmp0,tmp1);
		if(flag) cout<<" No"<<endl;
		else cout<<" Yes"<<endl;
	}
	return 0;
}