schedule

#include <iostream>
#include<cstdlib>
#include<iomanip>
#include<algorithm>

using namespace std;

struct Event {
    int start, end;
    /* bool operator < (const Event &x)const
  {
    return start<x.start;
  } */
};


int how_many_rooms (Event* e, int N)
{
    // sort(e,e+N);
    int maxr=0,r=0,time;
    int i=0,j=0;
    for(i;i<N;i++)
    {
        time=e[i].start;
        while(e[j].end<=time)
        {
            r--;
            j++;
        }
        r++;
        if(r>maxr)maxr=r;
    }
    return maxr;
}

int main() {
    int N;
    cin >> N;
    Event e[N];
    for (int i=0; i<N; i++) cin >> e[i].start >> e[i].end;

    cout << how_many_rooms(e, N) << endl;
}