Răspuns:
a.
# include <iostream>
using namespace std;
int main ()
{
cout << "1" << endl << "1 4" << endl << "1 4 9" << endl << "1 4 9 16" << endl;
return 0;
}
b.
# include <iostream>
using namespace std;
int main ()
{
cout << "+-+-"<< endl << "-+-"<< endl <<"+-"<< endl << "-";
return 0;
}
c.
# include <iostream>
using namespace std;
int main ()
{
cout << "2"<< endl << "3 2"<<endl<<"4 3 4"<<endl<<"5 4 5 4";
return 0;
}
d.
# include <iostream>
using namespace std;
int main ()
{
cout << "1 2 3 4 5"<<endl<<"4444"<<endl<<"123"<<endl<<"22"<<endl<<"1";
return 0;
}