Task is to make a program which will decide from the sequence can be chosen two numbers wit needed sum.
On the input is given numbers xi.
Numbers are splited with ,
Behind these numbers is ?
Than there are questions
Number of Question is not limited
Program must decide if number y can be bulit from two numbers xi+xj, i ≠ j.
Output is decision yes/no for every single question y.
Program must have protected input data.
If the input is bad program must find it and write error and end itself
• Not number xi,
• Numbers xi are not splitted by ,
• Less than 2 numbers xi,
• missing ?
• not number y.