Free Cash

#include<iostream>
#include <cstdlib> 
using namespace std;
int main()
{
    int a,b,t=1,t1=1,i,a1=0,b1=0,n;
    cin>>n;
    for(i=1;i<=n;i++)
    {
        cin>>a>>b;
        if(a==a1&&b==b1)t1++;
        else
        {
            a1=a,b1=b;
            if(t<t1)t=t1;
            t1=1;
        }
    }
    if(t<t1)t=t1;
    cout<<t;
    return 0;
}

http://codeforces.com/contest/237/problem/A