本蒟蒻的代码30分，后七个测试点TLE，大佬求调！！！！！

#include <iostream>
using namespace std;
int n, a[1000005], b, s;
int zs() {
	for (int i = 2; i <= n; i++)
	
		if (a[i] == 0) {
			for (int j = i; j <= n; j += i)
				a[j] = i;
		}
}
int main() {
	cin >> n >> b;		
	for (int i = 1; i <= n; i++) {
		zs();
		if (a[i] <= b ) {
			s++;
		}
	}
	cout << s;
}