constant = 0.0000001149241# The value of G(m1* m2)
print("This program will compute the root of radius using bisection method.")
# input the value of the graviational force
Force = input()
  #initial guess ; initial funtions...m = f(xL)....n = f(xRO )
xL=1
xU= 5
xRO = (xL + xU ) / 2 #old value
# m = f(r) = F(r^2) - G(m1* m2)
m = Force * xL * xL
m = float(m) - float(constant)
n = float(Force) * xRO * xRO
n = float(n) - float(constant)
# n = f(r) = f(xrRO)
#n = (Force*xRO*xRO) - constant;
prod = n * m
#condition when f(xL) * f(xR) is > , < and =
if prod > 0:
  xL= float(xRO) # new value
  xRO = (xL + xU ) / 2
  err = (xRO - xL ) / xRO #percent error
  while err >= 0.05:
    #repeat the process
    m = float(Force) * float(xL) * float(xL)
    m = float(m) - float(constant)
    n = float(Force) * xRO * xRO
    n = float(n) - float(constant)
    xL= float(xRO)
    xRO = (xL + xU ) / 2
    err = (xRO - xL ) / xRO

  print("Root of Radius =", xRO)
  
elif prod < 0:
  xU = xRO
  
elif prod == 0:
  print(xRO)
by