from math import ceil


def numberOfBricks(steps: int) -> int:
    """Calculate the number of bricks in some steps using arithmetic series: S(n) = n(n+1)/2."""
    return ceil((steps * (steps + 1)) / 2)


print("Testing numberOfBricks()...", end="")
assert numberOfBricks(0) == 0
assert numberOfBricks(1) == 1
assert numberOfBricks(2) == 3
assert numberOfBricks(3) == 6
assert numberOfBricks(4) == 10
assert numberOfBricks(10) == 55
print("Passed!")