inputs = input().split()
m = int(inputs[0])
n = int(inputs[1])

def a(m,n):
    if(m==0):
        return(n+1)
    elif(n==0):
        return(a(m-1,1))
    else:
        return(a(m-1,a(m,n-1)))

print(a(m,n))