百解不得其思

#include<iostream>
using namespace std;
int main()
{
	int h, r;
	cin >> h >> r;
	int v = h * r * r * 3.14;
	int s;
	if (20000 % v == 0)s = 20000 / v;
	else s = 20000 / v + 1;
	cout << s;
	return 0;
}