Score: 200 points
The number 105 is quite special - it is odd but still it has eight divisors. Now, your task is this: how many odd numbers with exactly eight positive divisors are there between 1 and N (inclusive)?
Input is given from Standard Input in the following format:
N
Print the count.
105
1
Among the numbers between 1 and 105, the only number that is odd and has exactly eight divisors is 105.
7
0
1 has one divisor. 3, 5 and 7 are all prime and have two divisors. Thus, there is no number that satisfies the condition.