from collections import defaultdict
N = int(input())
event = defaultdict(int)
for _ in range(N):
    l,r = list(map(int,input().split()))

    for i in range(30):
        if((l*2**i).bit_length() > 30):break
        event[l*2**i] += 1
        event[r*2**i-1] -= 1

ans = 0
now = 0
for a in sorted(event.keys()):
    now += event[a]
    ans = max(ans, now)
print(ans)