Safari World

Time limit

Memory limit

128 MB

Problem

Safari World is a mysterious country that exists only on the internet. It has two subdomains, seunghwan.royal.gov.sw and kyuhyun.royal.gov.sw. We want to compare the popularity of the two subdomains and find the difference between their popularity values.

Each subdomain's popularity is given as an integer. Given two popularity values N and M, write a program that prints the absolute difference between them.

Input

The first line contains two integers N and M, the popularity values of the two subdomains, separated by a space.

-2,000,000,000 <= N, M <= 2,000,000,000

Output

Print |N - M|, the difference between the two popularity values.