Description

A beverage company recently launched a "Collect Bottle Caps to Win Big Prizes" campaign: if you have $10$ bottle caps with "Lucky" or $20$ bottle caps with "Encouragement," you can exchange them for a mysterious grand prize. Given the number of bottle caps with "Lucky" and "Encouragement" that you have, determine if you can exchange them for the grand prize. If you can exchange for the grand prize, output $1$; otherwise, output $0$.

Input Format

One line containing two integers, representing the number of bottle caps with "Lucky" and "Encouragement," separated by a space.

Output Format

One line. If you can exchange for the grand prize, output $1$; otherwise, output $0$.

Sample

11 19

1