import sys
input = sys.stdin.readline
N, Q = map(int, input().split())

table = [1 << i for i in range(N + 1)]

for _ in range(Q):
  s, t = map(int, input().split())
  res = 0

  while s < t:
    ok = 0
    ng = N + 1
    while ng - ok > 1:
      m = (ok + ng) // 2
      x = table[m]
      if s % x == 0 and s + x <= t: ok = m
      else: ng = m
    s += table[ok]
    res += 1
  print(res)