// Constructor
public MathProblem(double a, double b, ProblemWritter problemWritter)
{
A = a;
B = b;
this.problemWritter = problemWritter;
}
public Substraction(int a, int b, ProblemWritter problemWritter)
: base(a, b, problemWritter)
{
}
public Summation(int a, int b, ProblemWritter problemWritter)
: base(a, b, problemWritter)
{
}
public Pushka(int a, int b, ProblemWritter problemWritter)
: base(a, b, problemWritter)
{
}