N = int(input())

L = []
R = []

lsize = 10 ** 18
event = []
for _ in range(N):
    l, r = map(int, input().split())
    while l < lsize:
        event.append((l,+1))
        event.append((r,-1))
        l *= 2
        r *= 2

event.sort()

pre = -1
cnt = 0
ans = 0
for p, x in event:
    cnt += x 
    if pre != p: ans = max(ans, cnt)
    pre = p
ans = max(ans, cnt)
print(ans)