#include <bits/stdc++.h>
using namespace std;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    
    int N; cin >> N;
    vector<pair<long long,int>> Query;
    int bil = 1'000'000'000;
    while(N--){
        long long l,r; cin >> l >> r;
        while(2*l < bil) l *= 2,r *= 2;
        Query.push_back({l,1}),Query.push_back({r,-1});
        Query.push_back({l*2,1}),Query.push_back({r*2,-1});
    }
    sort(Query.begin(),Query.end());
    int answer = 0,now = 0;
    for(auto [ign,v] : Query){
        now += v;
        answer = max(answer,now);
    }
    cout << answer << endl;
}