#For debugging purposes import time
import time

#Starting point for the search
tosearch=[[0,0]]

#The points that can be reached by the monkey are added into this list
confirmed=[]

#Main loop that goes through the list of points to be searched
for point in tosearch:

    if point not in confirmed:

    #Count the sum of the digits
        digits=str(abs(point[0]))+str(abs(point[1]))
        sum=0
        for i in digits:
            sum+=int(i)

        #Here it gets weird. See thread for details.
        if abs(sum)<=19:
            confirmed.append(point)
            tosearch.append([point[0],point[1]-1])
            tosearch.append([point[0]+1,point[1]])
            tosearch.append([point[0]-1,point[1]-1])
            tosearch.append([point[0],point[1]+1])
            tosearch.remove(point)
        else:
            tosearch.remove(point)

        #For debugging
        #print (tosearch[-5:-1])
        #print (confirmed[-1])
        #time.sleep(0.2)
    else:
        tosearch.remove(point)

print (len(confirmed))