using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Runtime.CompilerServices; using System.Text; using System.Threading.Tasks; namespace yukicore { internal class Program { //29 private static void Main(string[] args) { int[] gets = new int[3]; int[] items = new int[10]; Console.ReadLine(); int ans = 0; while (true) { var tmp = Console.ReadLine(); if (string.IsNullOrEmpty(tmp)) break; gets = tmp.Split(' ').Select(x => int.Parse(x) - 1).ToArray(); foreach (var get in gets) { items[get]++; if (items[get] == 2) { items[get] = 0; ans++; } } } ans += items.Sum(); Console.WriteLine(ans); } } }