21 lines
487 B
Python
21 lines
487 B
Python
cache = {}
|
|
|
|
def ack(m,n):
|
|
if (m,n) in cache:
|
|
return cache[(m,n)]
|
|
elif m == 0:
|
|
ans = n+1
|
|
elif n == 0:
|
|
ans = ack(m-1,1)
|
|
else:
|
|
ans = ack(m-1, ack(m, n-1))
|
|
cache[(m,n)] = ans
|
|
return ans
|
|
|
|
if __name__ == "__main__":
|
|
for i in range(6):
|
|
for j in range(6):
|
|
try:
|
|
print("ack(%d,%d) = %d" % (i,j, ack(i,j)))
|
|
except RuntimeError:
|
|
print("ack(%d,%d) = <StackOverflow>" % (i,j))
|