import sys

# sys.setrecursionlimit(200005)
int1 = lambda x: int(x)-1
p2D = lambda x: print(*x, sep="\n")
def II(): return int(sys.stdin.readline())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
def LI1(): return list(map(int1, sys.stdin.readline().split()))
def LLI1(rows_number): return [LI1() for _ in range(rows_number)]
def SI(): return sys.stdin.readline().rstrip()
# dij = [(0, 1), (-1, 0), (0, -1), (1, 0)]
# dij = [(0, 1), (-1, 0), (0, -1), (1, 0), (1, 1), (1, -1), (-1, 1), (-1, -1)]
# inf = 18446744073709551615
inf = 4294967295
# md = 10**9+7
md = 998244353

n, q = LI()
for _ in range(q):
    s, t = LI()
    if s == 0: lv = n
    else: lv = (s & -s).bit_length()-1
    ans = 0
    while s != t:
        while s+(1 << lv) > t: lv -= 1
        s += 1 << lv
        ans += 1
        # print(s,ans,lv)
        lv = (s & -s).bit_length()-1
    print(ans)