#!/usr/bin/env python3
from math import *
Tf, Vf, Hf, Td, Vd, Hd = [int(x) for x in input().split()]
Hr = abs(Hf - Hd)
Tr = abs(Td - Tf)
Taf = sqrt(2*Hr)
Tbf = sqrt(2*Hf)
Sa = Vf * Taf
Sb = Vf * Tbf
Tad = Sa / Vd + Tr
Tbd = Sb / Vd + Tr
if Tad <= Taf: print(Taf + Tad - Tr + Tf)
elif Tbd >= Tbf: print(Tbd*2 - Tr + Tf)
#else: print(2*(Vf * Tr)/abs(Vd - Vf) + Tf + Tad)
else: print((Vd*(Td - Tf))/(Vd - Vf) + Td)