# PMAT-502bv (Tranche 2): bare `return` (no value) in a void function — the
# early-exit guard-clause shape `if invalid: return`. Lowers to `return ();`.
def guard_div(v: int) -> None:
if v == 0:
return
x = 100 // v
assert x >= 0
def push_pos(xs: list[int], v: int) -> None:
if v < 0:
return
xs.append(v)