#include <iostream>
using namespace std;
short liczby[25];
short licznik=0;
short suma;
long long s;
int main()
{
while(cin>>liczby[licznik])
{
licznik++;
}
for(int i=0; i<licznik; i++)
{
switch(liczby[i])
{
case 0:
{
cout<<suma<<endl;
suma=0;
break;
}
default:
{
suma+=liczby[i];
s+=liczby[i];
}
}
}
cout<<s<<endl;
return 0;
}
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