Problems
N-unit numbers - 2
N-unit numbers - 2
Find the number of n-digit positive integers witch sum of digits equals to m.
Input
Two integers n and m (1 ≤ n ≤ 100, 1 ≤ m ≤ 900).
Output
Print the required amount of numbers.
Input example #1
2 10
Output example #1
9