using System;
class Program
{
    static void Main()
    {
        int N = int.Parse(Console.ReadLine());
        if (N > 0 && N <= 100)
        {
            string[,] IData = new string[N, 3];
            string[] buf = new string[2];

            for (int i = 0; i < N; i++)
            {
                buf = Console.ReadLine().Split(' ');
                IData[i, 0] = buf[0];
                IData[i, 1] = buf[1];
                IData[i, 2] = Convert.ToString(i + 1);
            }

            String[] Win = new string[N];
            string[] Lider = new string[2];
            Lider = IData[0, 1].Split(':');
            int k = 0;

            for (int i = 1; i < N+1; i++)
            {
                buf = IData[i, 1].Split(':');
                if (int.Parse(Lider[0]) > int.Parse(buf[0]))
                {
                    if (i == 1 && (60 - double.Parse(buf[1].Replace(".", ",")) + double.Parse(Lider[1].Replace(".", ",")) < 30))
                    {
                        Win[k] = IData[0,0];
                        k++;
                    }
                    Win[k] = IData[i, 0];
                    k++;
                    Lider = IData[i, 1].Split(':');

                }
                if (int.Parse(Lider[0]) == int.Parse(buf[0]))
                {
                    if (double.Parse(Lider[1].Replace(".", ",")) > double.Parse(buf[1].Replace(".", ",")))
                    {
                        double tmp = double.Parse(Lider[1].Replace(".", ",")) - double.Parse(buf[1].Replace(".", ","));
                        if (i == 1 && tmp < 30)
                        {
                            Win[k] = IData[0, 0];
                            k++;
                        }
                        Win[k] = IData[i, 0];
                        k++;
                        Lider = IData[i, 1].Split(':');
                    }
                }
                if (int.Parse(Lider[0]) < int.Parse(buf[0]))
                {
                    Win[k] = IData[0, 0];
                    k++;
                }
            }
            Console.WriteLine(k);
            Array.Sort(Win);
            for (int i = 0; i < k; i++)
            {
                Console.WriteLine(Win[i]);
            }
        }
    }
}

Edited by author 12.02.2013 23:07