from sys import setrecursionlimit setrecursionlimit(1000000) def ackmann(m,n): if m == 0: return n+1 if m>0 and n == 0: return ackmann(m-1,1) if m > 0 and n > 0: return ackmann(m-1,ackmann(m,n-1)) x,y = map(int,input().split()) print(ackmann(y,x))
from sys import setrecursionlimit setrecursionlimit(1000000) def ackmann(m,n): if m == 0: return n+1 if m>0 and n == 0: return ackmann(m-1,1) if m > 0 and n > 0: return ackmann(m-1,ackmann(m,n-1)) x,y = map(int,input().split()) print(ackmann(y,x))