"""Golden ratio constants"""
import math

PHI = (1 + math.sqrt(5)) / 2.0  # 1.618033988749895
INV_PHI = 1.0 / PHI  # 0.618033988749895
FIBONACCI = [1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233]

print(f"φ = {PHI:.10f}")
print(f"1/φ = {INV_PHI:.10f}")