i did exactly the same ,but my all cases did not pass >_< here it is:

include

include

include

include

include

using namespace std;

int main() {
int **arr;
int n,a,x,y,T;
int b;
cin>>n>>T;
arr=(int**) new int*[n];
for(int i=0;i<n;i++)
{
    cin>>a;
    arr[i]=new int[a];
    for(int j=1;j<=a;j++)
    {
        cin>>b;
        arr[i][j]=b;
    }
}

int **arr2;
arr2=(int**) new int*[T];
for(int i=0;i<T;i++)
{
    arr2[i]=new int[2];
}
for(int i=0;i<T;i++)
{
    cin>>x>>y;
    arr2[i][0]=x;
    arr2[i][1]=y;
}
for(int i=0;i<T;i++)
{
    cout<<arr[arr2[i][0]][arr2[i][1]+1]<<endl;

}
return 0;

}