local function mmi(a, b) return a < b and a or b end
local ffi = require("ffi")
local C = ffi.C
ffi.cdef[[
long long atoll(const char*);
]]

local function lltonumber(str)
  return C.atoll(str)
end

local n, q = io.read("*n", "*n", "*l")
local lim = 1LL
for i = 1, n do
  lim = lim + lim
end
for iq = 1, q do
  local s, t = io.read():match("(%d+) (%d+)")
  s = lltonumber(s)
  t = lltonumber(t)
  local z = 0
  local len = t - s
  local j1 = 1LL
  while s % (j1 + j1) == 0LL and j1 + j1 <= lim do
    j1 = j1 + j1
  end
  local j2 = 1LL
  while j2 + j2 <= len and j2 + j2 <= lim do
    j2 = j2 + j2
  end
  local j = mmi(j1, j2)
  s = s + j
  len = len - j
  
  while 0LL < len do
    while s % (2LL * j1) == 0LL and j1 + j1 <= lim do
      j1 = j1 + j1
      -- print("a", j1, s)
    end
    while s % j1 == 1LL do
      j1 = j1 / 2LL
      -- print("C", j1, s)
      -- print(j1, s)
    end
    while len < j2 do
      j2 = j2 / 2LL
      -- print("B", j2, len)
    end
    -- print(j1, j2)
    j = mmi(j1, j2)
    z = z + 1
    len = len - j
    s = s + j
  end
  print(z + 1)
end
-- print(os.clock())