import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner input = new Scanner(System.in); int n = input.nextInt(); int[][] items = new int[n][3]; for (int i = 0; i < n; i++) { items[i][0] = input.nextInt(); items[i][1] = input.nextInt(); items[i][2] = input.nextInt(); } int result = handleArr(items); System.out.println(result); } private static int handleArr(int[][] items) { int count = 0; for (int i = 0; i < items.length; i++) { for (int j = i+1; j < items.length; j++) { if (items[i][0] > items[j][0] && items[i][1] > items[j][1] && items[i][2] > items[j][2]) { count++; } else if (items[i][0] < items[j][0] && items[i][1] < items[j][1] && items[i][2] < items[j][2]) { count++; } else { continue; } } } return count; } }