Weird Symbol

Time limit2sMemory limit256 MB

Summary

Given two integers A and B, compute (A+B)*(A-B) and print the result.

Level: Easy1 of 10
Topics: Math, Implementation
Solved: No attempts yet

Problem

Hyo-jin, a student at Busan Science High School, is a math prodigy. There was even a school legend that she could solve any problem within a minute, but even Hyo-jin had a concern. Most problems contained a repeated operation. That operation was so long that Hyo-jin, who solved problems on paper, found it too painful, so she decided to invent a new operator herself.

The operator's symbol is ＠, defined as A＠B = (A+B)×(A-B).

However, when large numbers actually came up, Hyo-jin found calculating them too annoying.

Help Hyo-jin by writing a program that computes A＠B given integers A and B!

Input

The first line gives A and B. (1 ≤ A, B ≤ 100,000)

Output

Output the result of A＠B on the first line.

Examples2

Example 1
Input
```
4 3
```
Expected output
```
7
```
Example 2
Input
```
3 4
```
Expected output
```
-7
```