Safe landing

# code for safe landing
# http://www.codeabbey.com/index/task_view/safe-landing

[spaceship_m, fuel_m, h0, v0] = [6000, 7000, 150000, 2000]
#[spaceship_m, fuel_m, h0, v0] = [6000 7000 150000 2000]
H = h0 /1000; V = v0 / 1000; g0 = 1.622; dt = 0.01; Vexhaust = 2800
R = 1737.1 ;
fuel_speed = [0, 100, 100, 100, 50, 50, 50, 50, 50, 50, 100, 100, 100]
count = 0
while (H > 0):
  H -= V*dt
  if count % 1000 == 0:
    i = count // 1000
    if i < len(fuel_speed) and fuel_m > 0:
       Mexaust =  fuel_speed[i]
       dM = Mexaust * dt / 10
    else:
      Mexaust = 0
  fuel_m -= dM
  # каждые 10 секунд менять Mexaust, взяв его из списка
  # если топливо кончилось или нет больше элементов в списке
  # Mexaust = 0

  g_current = g0 * R**2 / (R+H)**2
  #print (g_current)
  V = V + g_current*dt / 1000
  #V -= Vexhaust * dM / (fuel_m + spaceship_m)
  count += 1

print (V, H, count)