def sum():
for i, j in x:
c[None] += ti.is_active(bm, [i, j])
s[None] += x[i, j]
def is_active():
c[None] = ti.is_active(a_a, [0])
def func():
for i in range(n * n):
s[None] += ti.is_active(x.parent().parent(), i)