tuenti1.cs

using System;
using System.IO;

namespace Tuenti1
{
    class Program
    {
        static void Main(string[] args)
        {
            var lines = File.ReadAllLines("submitInput.txt");
            
            var nTestCases = Convert.ToInt32(lines[0]);
            var result = "";
            
            for (int i = 1; i <= nTestCases; i++)
            {
                var nPersons = Convert.ToInt32(lines[i]);

                int nTables = 0;
                if (nPersons >= 1 && nPersons <= 4)
                    nTables = 1;
                else if (nPersons > 4)
                    nTables = ((nPersons - 4) >> 1) + (nPersons & 1) + 1;

                result += string.Format("Case #{0}: {1}\n",i, nTables);
            }

            string path = "submitOutput.txt";
            File.WriteAllText(path, result.ToString());
        }
    }
}