#include <iostream>

using namespace std;

int main()
{
    int x;
    bool hiba;
    do
    {
        cin >> x;
        hiba = cin.fail();
        if( hiba )
        {
            cerr << "Hoppá." << endl;
            cin.clear();
            string s;
            cin >> s;
        }
    } while ( hiba );
    cout << x << endl;
    return 0;
}

//////////////////////////////

#include <iostream>

using namespace std;

int main()
{
    int x;
    bool hiba;
    do
    {
        cin >> x;
        hiba = cin.fail();
        if( hiba )
        {
            cerr << "Hoppá." << endl;
            cin.clear();
            string s;
            getline(cin,s);
        }
    } while ( hiba );
    cout << x << endl;
    return 0;
}

///////////////////////////

#include <iostream>

using namespace std;

int main()
{
    int x;
    bool hiba;
    do
    {
        cin >> x;
        hiba = cin.fail();
        if( hiba )
        {
            cerr << "Hoppá." << endl;
            cin.clear();
            cin.ignore(1000,'\n');
        }
    } while ( hiba );
    cout << x << endl;
    return 0;
}

//////////////////////////////

#include <iostream>
#include <sstream>

using namespace std;

// Összegezzünk minden sort!

int main()
{
    //    cin >> x;
    // Ez nem jó, mert nem veszi észre, mikor van vége a sornak...
    
    string s;
    getline(cin,s);
    while( !cin.fail() )
    {
        stringstream ss(s);
        int x;
        ss >> x;
        int osszeg = 0;
        while( !ss.fail() )
        {
            osszeg += x;
            ss >> x;
        }
        cout << osszeg << endl;
        getline(cin,s);
    }
    return 0;
}