(￣(工)￣)

#include <bits/stdc++.h>
using namespace std;
int main(){
int h,r;
cin >> h >> r;
double PI = 3.14159;
double V = PI * r * r * h;
int sum = ceil(20000 / V);
cout << sum;
return 0;
}
(￣(工)￣)
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