#include<iostream>

using namespace std;
const int MAXN=5011;
int a[MAXN];
int main(){
int i,n,m,p,x,y; int rele(int); cin>>n>>m>>p; for(i=1;i<=n;i++)a[i]=i; for(i=1;i<=m;i++){ cin>>x>>y; if(x>y)a[x]=a[y]; else a[y]=a[x]; } for(i=1;i<=p;i++){ cin>>x>>y; if(rele(x)==rele(y))cout<<"Yes"<<endl; else cout<<"No"<<endl; } return 0; }
int rele(int x){
if(a[x]==x)return x; else return rele(a[x]); }