def solve(s, t, n):
    s += 2 ** n
    t += 2 ** n
    ans = 0
    while s < t:
        if s & 1:
            ans += 1
            s += 1
        if t & 1:
            t -= 1
            ans += 1
        s >>= 1
        t >>= 1

    return ans

n, q=map(int,input().split())

for _ in range(q):
    s, t = map(int,input().split())
    print(solve(s, t, n))