#include <bits/stdc++.h>
using namespace std;
struct R{
    //>=0&&de!=0
    long long nu,de;
    bool operator<(const R& other) const {
        return (__int128)nu*other.de<(__int128)de*other.nu;
    }
    bool operator==(const R& other) const {
        return (__int128)nu*other.de==(__int128)de*other.nu;
    }
};

int main(void){
    int n;
    cin>>n;
    vector<pair<R,int>>v;
    vector<int>p2;
    for(int i=0;i<31;i++){
        p2.push_back(1<<i);
    }
    int ans=0,sum=0;
    for(int i=0;i<n;i++){
        int l,r;
        cin>>l>>r;
        auto iter=upper_bound(p2.begin(), p2.end(),l);
        int pos = iter-p2.begin()-1;
        v.push_back({{l,p2[pos]},1});
        if(p2[pos]*2<=r)sum++;
        iter=upper_bound(p2.begin(), p2.end(),r);
        pos = iter-p2.begin()-1;
        v.push_back({{r,p2[pos]},-1});
    }
    sort(v.begin(),v.end());
    for(int i=0;i<v.size();i++){
        sum+=v[i].second;
        //cout<<sum<<" "<<ans<<" "<<v[i].second<<" "<<v[i].first.nu<<" "<<v[i].first.de<<endl;
        ans=max(sum,ans);
    }
    cout<<ans<<endl;
    return 0;
}