n = int(input())
E = []
N = 1<<70
t = 0
for _ in range(n):
    l, r = list(map(int, input().split()))
    while r < N:
        l *= 2
        r *= 2
    if N <= l:
        E.append((l, 1))
    else:
        t += 1
    E.append((r, -1))
    for _ in range(3):
        l, r = 2*l, 2*r
        E.append((2*l, 1))
        E.append((2*r, -1))

E.sort()
ans = 0
for _, s in E:
    t += s
    ans = max(ans, t)

print(ans)