#include <fstream>

using namespace std;

typedef struct nod
{
    int nr;
    nod *urm;
}NOD;
NOD *prim, *ultim;

void creare(NOD *&prim, NOD *&ultim)
{
    ifstream f("adunare.in");
    NOD *q;
    for(int i=1;i<=2;++i)
    {
        q=new NOD;
        f>>q->nr;
        q->urm=NULL;
        if(ultim)ultim->urm=q;
        else prim=q;
        ultim=q;
    }
    f.close();
}

int suma(NOD *prim)
{
    NOD *q;
    int S=0;
    for(q=prim;q;q=q->urm)
        S+=q->nr;
    return S;
}

int main()
{
    ofstream g("adunare.out");
    creare(prim,ultim);
    g<<suma(prim);
    f.close();
    g.close();
    return 0;
}