文件目录

#include <iostream>
using namespace std;
int main()
{
    int h, r;
    cin >> h >> r;
    double i;
    i = 3.14 * r * r * h;
    double t = 20000 / i;
    int t2 = t;
    if (t == t2)
        cout << t2;
    else
        cout << t2 + 1;
    return 0;
}