# PMAT-502bd (Tranche 2): dict + set comprehensions over range(...).
def sq_map(n: int) -> dict[int, int]:
return {x: x * x for x in range(n)}
def even_set(n: int) -> set[int]:
return {x for x in range(n) if x > 0}
def from_two(n: int) -> int:
d = {x: x for x in range(2, n)}
return len(d)