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#include <iostream>
#include <cmath>

using namespace std;


double min(int a, int b)

{

    if (a > b)

    return b;
    else
    return a;

}

int main()
{

     int a, b;

    cout << "Enter a, b" << endl;

      cin >> a >> b;

     double min1 = min(pow(a,3)-b , pow(b,2)+2);

     double min2 = min( (a * b) / (a + b) , pow(a,-b) );

        int d = min1 - min2;

     cout << d << endl;


}