for in range -80 61 for in range -60 41 if and and 20 print

1
2
3
4
5
6
n = 0
for i in range(-80, 61):
for j in range(-60, 41):
if 2*i >= 3*j and 3*i >= 4*j and 5*i - 7*j <= 20:
n += 1
print(n)