from sys import argv
from time import time
def is_prime(n):
factors = 0
for i in range(2, n):
if n % i == 0:
factors += 1
return factors == 0
limit = int(argv[1])
total = 0
t0 = time()
for i in range(2, limit):
if is_prime(i):
total += 1
t1 = time()
print(total)
print(t1 - t0)