标签：des style color java os strong io for
3 Alice Bob Smith John Alice Smith 5 a c c d d e b e a d 0
Yes No
#include<iostream>
#include<string>
#include<set>
#include<cstdio>
using namespace std;
int main()
{
set<string>shu,ying;
string a1,a2;
int i,n;
set<string>::iterator k;
while(scanf("%d",&n),n)
{
shu.clear();
ying.clear();
for(i=1;i<=n;i++)
{
cin>>a1>>a2;
ying.insert(a1);
shu.insert(a2);
}
for(k=shu.begin();k!=shu.end();k++)
{
if(ying.count(*k))
ying.erase(*k);
}
if(ying.size()==1)
printf("Yes\n");
else
printf("No\n");
}
return 0;
}标签：des style color java os strong io for
原文地址：http://blog.csdn.net/hpuhjl/article/details/38331355
