n = int(input())
event = []
for i in range(n):
	l, r = map(int,input().split())
	event.append((l * 2, +1))
	event.append((r * 2 - 1, -1))

event.sort()
ans = 0
tmp = 0
for [c, d] in event:
	tmp += d
	ans = max(ans, tmp)
print(ans - 1)