import sys
from scipy.optimize import newton
import numpy as np

read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

P, Q = map(int, read().split())

def f(x):
    return x * x - Q * x * np.log2(x) - P

x = newton(f, x0=10**20, maxiter=1000)
print(x)