import sys, time
def tier(x):
if x >= 500: return 3
if x >= 200: return 2
return 1
def bench(n):
s = 0
for i in range(n):
s += i * tier(i)
return s
N = int(sys.argv[1]) if len(sys.argv) > 1 else 1000
for _ in range(100):
bench(N)
iters = 10000
start = time.monotonic_ns()
for _ in range(iters):
r = bench(N)
elapsed = time.monotonic_ns() - start
print(f"result: {r}")
print(f"iterations: {iters}")
print(f"total: {elapsed / 1e6:.2f}ms")
print(f"per call: {elapsed // iters}ns")