import sequtils, strutils,algorithm
var
    N = stdin.readLine.parseInt
    r,R,cnt : int
    A = newSeq[array[0..1, int]](0)

for i in 1..N:
    var in1 = stdin.readLine.split.map(parseInt)
    (r, R) = (in1[0], in1[1])
    A.add([r, 1])
    A.add([R, -1])
A.add([1000000005, 0])
proc cmp1(x, y : array[2, int]): int =
    system.cmp(x[0], y[0])
var res = 0
sort(A, cmp1)

for i, a in A:
    if i + 1 == A.len:
        break
    cnt += a[1]
    if a[0] != A[i + 1][0]:
        res = max(cnt,res)

echo res - 1