Zbir

#include <iostream>
using namespace std;

int sl_br (char a)
{
    switch (a)
    {
           case '0': return 0; break;
           case '1': return 1; break;
           case '2': return 2; break;
           case '3': return 3; break;
           case '4': return 4; break;
           case '5': return 5; break;
           case '6': return 6; break;
           case '7': return 7; break;
           case '8': return 8; break;
           case '9': return 9; break;
    }
}

string br_sl (int a)
{
     switch (a)
     {
           case 0: return "0"; break;
           case 1: return "1"; break;
           case 2: return "2"; break;
           case 3: return "3"; break;
           case 4: return "4"; break;
           case 5: return "5"; break;
           case 6: return "6"; break;
           case 7: return "7"; break;
           case 8: return "8"; break;
           case 9: return "9"; break;
           case 10: return "01"; break;
           case 11: return "11"; break;
           case 12: return "21"; break;
           case 13: return "31"; break;
           case 14: return "41"; break;
           case 15: return "51"; break;
           case 16: return "61"; break;
           case 17: return "71"; break;
           case 18: return "81"; break;
     }
}

string saberi (string a, string b)
{
       string k = "";

       if (a.length()>b.length())
          {
              for (int i=0; i<a.length()-b.length(); i++)
                  k = k + "0";
              k = k + b;
              b = k;
          }
       else if (b.length()>a.length())
          {
              for (int i=0; i<b.length()-a.length(); i++)
                  k = k + "0";
              k = k + a;
              a = k;
          }

       k = "";

       for (int i=a.length()-1; i>=0; i--)
           k = k + br_sl(sl_br(a[i])+sl_br(b[i]));

       return k;
}

main()
{
      string a, b;

      cin >> a >> b;

      string s =  saberi(a, b);

      for (int i=s.length()-1; i>=0; i--)
      cout << s[i];

      cout << endl;

      system("PAUSE");
}