#include <iostream>
#include<cmath>
using namespace std;

#define PI 3.14

int main() {
    int h = 0;
    int r = 0;
    int area = 0;
    int cup = 0;

    cin >> h >> r;

    area = PI * h * pow(r, 2);
    cup = 10000 / area;

    if (10000 % area != 0) {
        cup = cup + 1;
    }

    cout << cup << endl;

    return 0;
}