#define _USE_MATH_DEFINES
#include <cstdio>
#include <iostream>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <complex>
#include <string>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <bitset>
#include <numeric>
#include <limits>
#include <climits>
#include <cfloat>
#include <functional>
#include <iterator>
using namespace std;

int main()
{
    int n, d, k;
    cin >> n >> d >> k;
    vector<int> x(n);
    for(int i=0; i<n; ++i)
        cin >> x[i];

    int ans = 0;
    int a, b;
    multiset<pair<int, int> > ms;
    for(int i=0; i<n; ++i){
        ms.insert(make_pair(x[i], i));
        pair<int, int> p = *ms.begin();
        if(ans < x[i] - p.first){
            ans = x[i] - p.first;
            a = p.second;
            b = i;
        }
        if(i-d >= 0)
            ms.erase(make_pair(x[i-d], i-d));
    }

    ans *= k;
    cout << ans << endl;
    if(ans > 0)
        cout << a << ' ' << b << endl;

    return 0;
}