#include <stdio.h>
int main()
{
int n, m, a, sum, i, j;
while(scanf("%d", &n) != EOF)
for(i = 0; i < n; i ++)
scanf("%d", &m);
sum = 0;
for(j = 0; j < m; j ++)
scanf("%d", &a);
sum = sum + a;
}
printf("%d\n", sum);
return 0;