#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int n;
    cin>>n;
    vector<int>time_table(16,0);
    for (int i=0;i<n;i++){
        int s,e;
        cin>>s>>e;
        for (int j=s;j<e;j++)time_table[j]++;
    }
    int ans=*max_element(time_table.begin(),time_table.end());
    cout<<ans<<"\n";
    return 0;
    }//Butcher Vanity(1억뷰!) SV1&SV2&2p 모두 디자인 ㄷㅂ 잘 나옴... 어쨋거나 아니 걔내(Yi Xi!!) 목소리 왜이렇게 좋음...

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