一中校运会之百米跑

#include<bits/stdc++.h>
#define fi first
#define se second
#define pb push_back
#define PII pair<int,int >
#define int long long 
#define IOS std::ios::sync_with_stdio(false),cin.tie(0),cout.tie(0);
using namespace std;
const int N = 1e6+10;
map<string,string> acc;
string a,b;
string find(string x)
{
	if(acc[x]==x) return x;
	else return acc[x]=find(acc[x]);
}
signed main()
{
	IOS;
	int n,m,k;
	cin>>n>>m;
	for(int i=1;i<=n;i++)
	{
		cin>>a;
		acc[a]=a;
	}
	for(int i=1;i<=m;i++)
	{
		cin>>a>>b;
		string t1=find(a),t2=find(b);
		acc[t1]=t2;
	}
	cin>>k;
	for(int i=1;i<=k;i++)
	{
		cin>>a>>b;
		string t1=find(a),t2=find(b);
		if(t1!=t2) cout<<"No."<<"\n";
		else cout<<"Yes."<<"\n";
	}
	return 0;
}