#include <iostream>

using namespace std;

int a=0;
int b=0;
int c=0;
int d=0;
int sumaab=0;
int sumabc=0;
int kwadrat1=0;
int kwadrat2=0;
int main()
{
    cout << "Hello world!" << endl;
    cout << "Podaj a :" << endl;
    cin >> a;
    cout << "Podaj b :" << endl;
    cin >> b;
    cout << "Podaj c :" << endl;
    cin >> c;
    cout << "Podaj d :" << endl;
    cin >> d;
    sumaab=a+b;
    sumabc=b+c;
    kwadrat1=a*a;
    kwadrat2=b*b;
    if (sumaab>sumabc)
        cout<<"Suma a oraz b wynosi :" << sumaab << endl;

    if (a,b%2==0){
        cout<<"Kwadrat a wynosi :" << kwadrat1 << endl;
        cout<<"Kwadrat b wynosi :" <<kwadrat2 << endl;
    }
    else{
        cout<<"Jedna z liczb nie jest parzysta"<<endl;
    }




    return 0;
}