Week 1 Introduction Part 2


Time limit 1 second
Memory limit 128 MiB

Create class Integer according to the next class diagram:

Given three integers a, b, c, calculate the value of expression (a * 7 + b - 2) * (a - c + 5).

interface MyNumber
  public long getValue();
  public MyInteger Add(long a);
  public MyInteger Add(MyInteger a);  
  public MyInteger Minus(long a);
  public MyInteger Minus(MyInteger a);
  public MyInteger Multiply(long a);
  public MyInteger Multiply(MyInteger a);
  public MyInteger Divide(long a);
  public MyInteger Divide(MyInteger a);  

class MyInteger implements MyNumber
  private long n;
  MyInteger(long n){

Input data

One line contains three integers a, b, c no more than 10^9 by absolute value.

Output data

Print the value of given expression.


Input example #1
1 2 3
Output example #1
Author Mykhailo Medvediev
Source Object Oriented Design