快速输入（简单版）

#include<cstdio>
#include<bitset>
using namespace std;
#define nc getchar
int n,q;
bitset<1002> S[10002];

/*快速输入*/
inline int red(){
    int res=0,f=1;char ch=nc();
    while (ch<'0'||'9'<ch) {if (ch=='-') f=-f;ch=nc();}
    while ('0'<=ch&&ch<='9') res=res*10+ch-48,ch=nc();
    return res*f;
}


int main(){
    n=red();
    for (int i=1;i<=n;i++)
     for (int j=1,k=red();j<=k;j++)
      S[red()].set(i);
    q=red();
    while (q--){
        int i=red(),j=red();
        if ((S[i]&S[j]).any()) printf("Yes\n");else printf("No\n");
    }
    return 0;
}