using namespace std;

int main()
{
    int n = 4;
   int tab[n]={2,3,3,4};
   bool btab [n];

   for (int i=0; i<n; i++) btab [i] = true;

   int sum = 0;
   for (int i=0; i<n; i++){
       for (int j=i+1; j<n; j++){
           if (tab[i] == tab[j]){
               btab [i] = false;
               btab [j] = false;
           }
       }
   }

    for (int i=0; i<n; i++){
        if (btab[i]) sum += tab[i];
    }



cout << sum;

    return 0;
}