#include <iostream>
using namespace std;
int testy, ilosc, liczba[50], suma;
int main()
{
cin>>testy;
for (int i=0; i<testy; i++)
{
cin>>ilosc;
for (int i=0; i<ilosc; i++)
{
cin>>liczba[i];
suma+=liczba[i];
}
}
cout<<suma;
return 0;
}
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