import random
from fractions import gcd


wins = 0
times = 0

for i in range(10000):
	times += 1

	x = random.randint(0, 1000)
	win = True
	for i in range(1000):
		if random.randint(0, 1000) == x:
			win = False
			break
	if win:
		wins += 1


print wins / gcd(wins, times), "/", times / gcd(wins, times)