from time import time
start=time()
a=(0,0)
nr = 0

def rec(tuple):
    if tuple[0]!=20:
        tuple[0]+=1
        rec(tuple)
    if tuple[1]!=20:
        tuple[1]+=1
        rec(tuple)
    if tuple[0]==20 and tuple[1]==20:
        nr+=1
        print(nr)
        return

rec(a)
print(nr)
print(time()-start)