11.#include <iostream>
using namespace std;
int main()
{
int a,b,s,d;
cin>>a>>b;
s=a+b;
d=a-b;
cout<<"Suma: "<<s<<endl;
cout<<"Diferenta: "<<d;
}
13. #include <iostream>
using namespace std;
int main()
{
cout<<" *"<<endl;
cout<<" * * *"<<endl;
cout<<" * * * * *"<<endl;
cout<<" * * * * * * *"<<endl;
cout<<"* * * * * * * * *"<<endl;
}
