题解 | #放苹果#

def f(m,n):
    if n < 0 or m < 0:
        return False
    elif m == 1 or n == 1:
        return 1
    else :
        return  f(m,n-1) + f(m-n,n)

m,n = list(map(int,input().split()))
print(f(m,n))