using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Text;
using System.Text.RegularExpressions;
using System.Linq;
using System.IO;

class Program
{
    static void Main(string[] args)
    {
        new Magatro().Solve();
    }
}



public class Magatro
{
    private int N, D, K;
    private int[] X;
    private int[] Table;
    private int[] Index;
    private const int T = 1000;

    private void Scan()
    {
        string[] line = Console.ReadLine().Split(' ');
        N = int.Parse(line[0]);
        D = int.Parse(line[1]);
        K = int.Parse(line[2]);
        X = new int[N];
        Table = new int[(N + T - 1) / T];
        Index = new int[(N + T - 1) / T];
        for (int i = 0; i < N; i++)
        {
            X[i] = int.Parse(Console.ReadLine());
            if (Table[i / T] < X[i])
            {
                Table[i / T] = X[i];
                Index[i / T] = i;
            }
        }
    }

    public void Solve()
    {
        Scan();
        int ans = 0;
        int ansL = -1, ansR = -1;
        for (int i = 0; i < N - 1; i++)
        {
            int right = Math.Min(i + D, N - 1);
            int max = 0;
            int r = -1;
            for (int j = i + 1; j <= right && j % T <= T - 1; j++)
            {
                if (max < X[j])
                {
                    max = X[j];
                    r = j;
                }
            }

            for (int j = i / T + 1; j < right / T; j++)
            {
                if (max < Table[j])
                {
                    max = Table[j];
                    r = Index[j];
                }
            }

            for (int j = right; j >= i && j % T != T - 1; j--)
            {
                if (max <= X[j])
                {
                    max = X[j];
                    r = j;
                }
            }

            if (ans < max - X[i])
            {
                ans = max - X[i];
                ansL = i;
                ansR = r;
            }
        }
        Console.WriteLine((long)ans * K);
        if(ans == 0)
        {
            return;
        }
        Console.WriteLine($"{ansL} {ansR}");
    }
}