#include <iostream>
#include <cmath>
using namespace std;
const double eps = 1e-9; // 1 / 10^9

int main()
{
    double L = 0.0;
    double R = 20000.0;

    while(fabs(R - L) > eps) {
        double mid = L + (R - L) / 2.0;

    }

    return 0;
}