#include <cstdlib>
#include <iostream>
using namespace std;

int sredab(int a,int b) 
   {int sum=0;
       if (a<b)
       {for (int i=a+1; i < b; i++)
        sum+=i;
        return sum/(b-a);
       }
       else
       {for (int i=b+1; i < a; i++)
        sum+=i;
        return sum/(a-b);
        }
    
    }

int main()
{   int a1,b1;
    cout << "Unesi brojeve "; 
    cin >> a1 >> b1;
    cout << "aritmeticka sredina između" << a1 << " i " << b1 << " = " << sredab(a1,b1) << endl;
    return 0;
}