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using System;
namespace Hiho
{
    class Hiho
    {
        static void Main(string[] args)
        {
            int i=0;
            string line;
            int N=0;
            int M=0;
            int iCount=0;
            while((line = Console.ReadLine()) != null)
            {
                i++;
               
                if(i==1) 
                {
                    iCount=Convert.ToInt32(line);
                    continue;
                    
                }
                
                if(i>iCount)
                {
                    break;
                }
                
                if(i%2==0)
                {
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