zadam

#!/usr/bin/python

# This is used for calculating of birthday paradox for large values
# We're using approximation explained here: http://preshing.com/20110504/hash-collision-probabilities/
# Beware that approximation isn't very precise at smaller params N and K, but gets more precise with large numbers

# see https://docs.python.org/3/library/decimal.html#module-decimal
from decimal import *

# setting decimal precision