题解

#include <iostream>
using namespace std;
int main(){
    double h,r;
    cin>>h>>r;
    if(20000/(r*r*3.14159*h)==0){
        cout<<int(20000/(r*r*3.14159*h));
    }else{
        cout<<int(20000/(r*r*3.14159*h)+1);
    }
    return 0;
}