#include <iostream>
#include<fstream>
#include <numeric>
#include <algorithm>
using namespace std;

struct Student {
int scores[5];
int n;
Student(){
};
void fillScores(int(& arr)[5]){
	for(int i=0;i<5;i++)
		scores[i]=arr[i];
};
int calculateTotalScore() const
{
	return accumulate(scores,scores+5,0);
};
void print() const
{
	for(int i=0;i<5;i++)
  			cout<<scores[i]<<" ";
};
};
int pero;
bool vece(Student x)
{
    if(x.calculateTotalScore()>=pero){return true;}
    else{return false;}
}


int main()
{


    ifstream file("data.txt");
    int n;
	file>>n;

    int array[5];//bodovi
    Student* studenti=new Student[n];
	int j;
    for(j=0;j<n;j++)
    {
		    for(int i=0;i<5;i++)
        	{file>>array[i];}
        studenti[j].fillScores(array);
	  	//studenti[j].print();
	}
//	cout<<studenti[0].calculateTotalScore();
	pero=studenti[0].calculateTotalScore();


	cout<<count_if(studenti+1,studenti+n,vece);

	delete [] studenti;
}