def check(state, nextX):
nextY = len(state)
for i in range(nextY):
if abs(state[i]-nextX) in (0, nextY-i):
return True
return False
def queen(n, state=()):
for one in range(n):
if not check(state, one):
a = state+(one,)
if len(a) == n:
print(a)
else:
queen(n,state=a)
queen(5)