Calculate the power of an army of numbers from 1 to $N$, both included.

-----Input:-----
- First line will contain a single integer $N$.

-----Output:-----
For each testcase, output in a single line containing the answer.

-----Constraints-----
- $1 \leq N \leq 5000$

-----Sample Input:-----
24

-----Sample Output:-----
5

Difficulty: UNKNOWN_DIFFICULTY

Solutions:
n = int(input())
plist = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313]
power = 1
for i in range(2, n + 1, 1):
	pdiv = []
	count = 0
	for p in plist:
		if i >= p and i % p == 0:
			pdiv.append(p)
	for pd in pdiv:
		if i % pd ** 2 == 0:
			count += 1
	if count == len(pdiv) and count != 0:
		power += 1
print(power)