import java.util.Scanner;

public class DecidePerson {

public int solution(int n, int[][] arr){

int answer = 0, max = Integer.MIN_VALUE;

for (int i=0; i<n; i++){

int tmp=0;

for (int j=0; j<n; j++){

for (int k =0; k<5; k++){

if(arr[i][k] == arr[j][k]){

tmp++;

break;

}

}

}

if(max < tmp){

answer = i;

max=tmp;

}

}

return answer+1;

}

public static void main(String[] args) {

DecidePerson t = new DecidePerson();

Scanner scanner = new Scanner(System.in);

int n = scanner.nextInt();

int[][] arr = new int[n][5];

for (int i=0;i<n;i++){

for(int j=0;j<5;j++){

arr[i][j] = scanner.nextInt();

}

}

System.out.println(t.solution(n, arr));

}

}