local mfl, mce = math.floor, math.ceil
local bls, brs = bit.lshift, bit.rshift
local bxor = bit.bxor

local function getgcd(x, y)
  while 0 < x do
    x, y = y % x, x
  end
  return y
end
local function getlcm(x, y)
  local gcd = getgcd(x, y)
  return mfl(x / gcd) * y
end

local function grayCode(x)
  return bxor(x, brs(x, 1))
end

local function grayWalk(size, add_func, rm_func, work_func)
  local prv = 0
  local total = bls(1, size) - 1
  local bpos = {}
  for i = 1, size do
    bpos[bls(1, i - 1)] = i
  end
  -- work_func()
  for i = 1, total do
    local v = grayCode(i)
    if prv < v then
      prv, v = v, v - prv
      add_func(bpos[v])
    else
      prv, v = v, prv - v
      rm_func(bpos[v])
    end
    work_func()
  end
end

local n, left, right = io.read("*n", "*n", "*n")
local a = {}
for i = 1, n do
  a[i] = io.read("*n")
end
local t = {}
local f = {}
local ai = 0
local gx = 0
local gc = 0
local gr = 0
local function add_func(idx)
  f[idx] = true
  gc = gc + 1
end
local function rm_func(idx)
  f[idx] = false
  gc = gc - 1
end
local function work_func()
  local v = false
  for i = 1, n - 1 do
    if f[i] then
      if v then
        v = getlcm(v, t[i])
      else
        v = getlcm(ai, t[i])
      end
    end
    if v and gx < v then return end
  end
  if gc % 2 == 1 then
    gr = gr - mfl(gx / v)
  else
    gr = gr + mfl(gx / v)
  end
end
local function solvesub(ai, x)
  grayWalk(n - 1, add_func, rm_func, work_func)
end

local function solve(x)
  gr = 0
  gx = x
  gr = 0
  for i = 1, n do
    local tc = 0
    for j = 1, n do
      if i ~= j then
        tc = tc + 1
        t[tc] = a[j]
      end
    end
    ai = a[i]
    for i = 1, n - 1 do f[i] = false end
    gc = 0
    gr = gr + mfl(x / ai)
    grayWalk(n - 1, add_func, rm_func, work_func)
  end
  return gr
end

local ret = solve(right)
if 1 < left then ret = ret - solve(left - 1) end
print(ret)