import random
NUM_TESTS = 10000000


def coin_flip():
	return random.randint(0,1)


def straw_test():
	return random.randint(0,4)


def main():
	success = 0
	for i in range(NUM_TESTS):
		if (straw_test() == 0):
			success += 1
		else:
			if (coin_flip() == 0):
				success += 1

	success_rate = (success / NUM_TESTS) * 100
	print("Chance of survival is %s%%" % (success_rate))


if __name__ == "__main__":
	main()