#include <bits/stdc++.h>
#include<algorithm>
using namespace std;
int main(){
ios_base::sync_with_stdio(0); cin.tie(NULL); cout.tie(0);
int n,a[100]{},mx=-1;
string x;
map<string,int>mp;
cin>>n;
for(int i=0;i<n;i++){
cin>>x;
mp[x]++;
}
for(auto i:mp)mx=max(mx,i.second);
cout<<mx;
}
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