using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Numerics;
using System.Text;
using static System.Console;
using static System.Convert;
using static System.Math;
using static Extentions;

class IO
{
    int idx;
    string[] input;

    public IO(TextReader reader)
    {
        input = reader.ReadToEnd().Split(new[] { " ", "\n", "\r" },
            StringSplitOptions.RemoveEmptyEntries);
    }

    T Get<T>(Func<string, T> parser) => parser(input[idx++]);

    public string S => Get(s => s);
    public char C => Get(char.Parse);
    public int I => Get(int.Parse);
    public long L => Get(long.Parse);
    public double F => Get(double.Parse);
    public decimal D => Get(decimal.Parse);
    public BigInteger B => Get(BigInteger.Parse);

    T[] Gets<T>(int n, Func<string, T> parser)
        => input.Skip((idx += n) - n).Take(n).Select(parser).ToArray();

    public string[] Ss(int n) => Gets(n, s => s);
    public char[] Cs(int n) => Gets(n, char.Parse);
    public int[] Is(int n) => Gets(n, int.Parse);
    public long[] Ls(int n) => Gets(n, long.Parse);
    public double[] Fs(int n) => Gets(n, double.Parse);
    public decimal[] Ds(int n) => Gets(n, decimal.Parse);
    public BigInteger[] Bs(int n) => Gets(n, BigInteger.Parse);

    public void Write<T>(params T[] xs) => WriteLine(string.Join(" ", xs));
    public void Write(params object[] xs) => WriteLine(string.Join(" ", xs));
}

class SegmentTree<T>
{
    int n;
    T[] tree;
    T id;
    Func<T, T, T> ope;

    public SegmentTree(int n, T id, Func<T, T, T> ope) : this(id, ope)
    {
        this.n = 1;
        while (this.n < n) this.n *= 2;
        tree = Enumerable.Repeat(id, this.n * 2).ToArray();
    }

    public SegmentTree(T[] xs, T id, Func<T, T, T> ope) : this(id, ope)
    {
        n = 1;
        while (n < xs.Length) n *= 2;
        tree = new T[n * 2];
        for (var i = 0; i < n; i++)
            tree[i + n] = i < xs.Length ? xs[i] : id;
        for (var i = n - 1; i > 0; i--)
            tree[i] = ope(tree[i * 2], tree[i * 2 + 1]);
    }

    SegmentTree(T id, Func<T, T, T> ope)
    {
        this.id = id;
        this.ope = ope;
    }

    public T this[int i]
    {
        get { return tree[i + n]; }
        set
        {
            tree[i += n] = value;
            for (i >>= 1; i > 0; i >>= 1)
                tree[i] = ope(tree[i * 2], tree[i * 2 + 1]);
        }
    }

    public T this[int i, int j]
    {
        get
        {
            var r = id;
            i += n;
            j += n + 1;
            for (; i < j; i >>= 1, j >>= 1)
            {
                if ((j & 1) != 0) r = ope(r, tree[--j]);
                if ((i & 1) != 0) r = ope(r, tree[i++]);
            }
            return r;
        }
    }
}

static class Extentions
{
}

static class Program
{
    public static void Main()
    {
        var sw = new StreamWriter(OpenStandardOutput()) { NewLine = "\n" };
#if DEBUG
        sw.AutoFlush = true;
#else
        sw.AutoFlush = false;
#endif
        SetOut(sw);
        Solve(new IO(In));
        Out.Flush();
    }

    static void Solve(IO io)
    {
        var n = io.I;
        var d = io.I;
        var k = io.L;
        var x = io.Ls(n);

        var st = new SegmentTree<long>(x, 0, Max);

        var max = 0L;
        var maxi = 0;

        for (var i = 0; i < n; i++)
        {
            var t = st[i, Min(n - 1, i + d)];

            if (t - x[i] > max)
            {
                max = t - x[i];
                maxi = i;
            }
        }

        var p = maxi;
        var q = maxi + Array.FindIndex(x.Skip(maxi).ToArray(),
            a => a == max + x[maxi]);
        max *= k;

        if (max <= 0) io.Write(0);
        else
        {
            io.Write(max);
            io.Write(p, q);
        }
    }
}