[실5] 1418 - K-세준수

#include <iostream>
using namespace std;

int main() 
{
	int n, k, res = 0;
	cin >> n >> k;

	for (int i = 1; i <= n; i++)
	{
		int t = i;

		for (int j = 2; j <= k; j++)
		{
			while (t % j == 0)
				t /= j;
		}
		res += t == 1;
	}
	cout << res;
}