#include <iostream>
#include <cmath>
using namespace std;
int main(int argc, char * argv[])
{
double S = 1000000, m = 14749, n = 10;
double r = 0.5, old = 0, epsilon = 1e-8;
for(;abs(r - old) > epsilon;)
{
old = r;
r = 12*m/S*(1 - 1/pow(1+old,n));
}
cout << r*100 << endl;
}
I2luY2x1ZGUgPGlvc3RyZWFtPgojaW5jbHVkZSA8Y21hdGg+Cgp1c2luZyBuYW1lc3BhY2Ugc3RkOwoKaW50IG1haW4oaW50IGFyZ2MsIGNoYXIgKiBhcmd2W10pCnsKCiAgICBkb3VibGUgUyA9IDEwMDAwMDAsIG0gPSAxNDc0OSwgbiA9IDEwOwoKICAgIGRvdWJsZSByID0gMC41LCBvbGQgPSAwLCBlcHNpbG9uID0gMWUtODsKCiAgICBmb3IoO2FicyhyIC0gb2xkKSA+IGVwc2lsb247KQogICAgewogICAgICAgIG9sZCA9IHI7CiAgICAgICAgciA9IDEyKm0vUyooMSAtIDEvcG93KDErb2xkLG4pKTsKICAgIH0KCiAgICBjb3V0IDw8IHIqMTAwIDw8IGVuZGw7CgoKfQoK