/*
TASK:PHONE
LANG:C++
*/
#include<iostream.h>
int main ()
{
int n,k,k1,k2,k3,l,l1,l2,l3,a[10],a1[10],a2[10],a3[10];
double m,m1,m2,m3;
cin >> n;
cin >> k >> m >> l;
for (int i=0;i<l;i++)
cin >> a[i];
if (n==1)
{cout << m;} else
if (n==3){
cin >> k1 >> m1 >> l1;
for (i=0;i<l;i++)
cin >> a1[i];
cin >> k2 >> m2 >> l2;
for (i=0;i<l;i++)
cin >> a2[i];
cin >> k3 >> m3 >> l3;
for (i=0;i<l;i++)
cin >> a3[i];
cout << m+m1;
}
return 0;
}