using System;
using System.Collections.Generic;

namespace JandexProblems
{
    class Program
    {
        static void Main(string[] args)
        {
            var line = Console.ReadLine();
            var zummersArgs = line.Split(' ');

            var zummersCount = Convert.ToInt32(zummersArgs[0]);
            var zummersPeriod = Convert.ToInt32(zummersArgs[1]);
            var andrewZummersCountBeforeAwake = Convert.ToInt32(zummersArgs[2]);

            line = Console.ReadLine();
            var zummersStartTimeArgs = line.Split(' ');
            var zummersStartTime = new int[zummersCount];

            for (int i = 0; i < zummersCount; i++)
            {
                zummersStartTime[i] = Convert.ToInt32(zummersStartTimeArgs[i]);
            }

            Array.Sort(zummersStartTime);
            var timeSet = new HashSet<int>();

            var andrewAwakeTime = 0;
            while (andrewZummersCountBeforeAwake > 0)
            {
                for (int i = 0; i < zummersCount; i++)
                {
                    if (andrewZummersCountBeforeAwake > 0 && !timeSet.Contains(zummersStartTime[i]))
                    {
                        andrewAwakeTime = zummersStartTime[i];
                        timeSet.Add(zummersStartTime[i]);
                        andrewZummersCountBeforeAwake--;
                    }

                    zummersStartTime[i] += zummersPeriod;
                    if (andrewZummersCountBeforeAwake <= 0)
                    {
                        break;
                    }
                }
            }

            Console.Write(andrewAwakeTime);
        }
    }
}