#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <map>
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)

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

	map<int,int>m;
	pair<int,int> ans = make_pair(0,0);
	for (int i = 0; i <= d;i++) {
		if (m.find(x[i]) == m.end()) {
			m[x[i]] = 1;
		}else m[x[i]]++;
	}

	auto fin = --m.end();
	ans = make_pair(fin->first - x[0], 0);
	for (int i = d + 1; i < n; i++) {
		m[x[i - d - 1]]--;
		if (m[x[i - d - 1]] == 0)m.erase(m.find(x[i - d - 1]));
		m[x[i]]++;
		auto fin = --m.end();
		if (ans.first < fin->first - x[i - d]) {
			ans = make_pair(fin->first - x[i - d], i - d);
		}
	}

	cout << (long long)ans.first*k << endl;
	if (ans.first) {
		for (int i = ans.second; i <= ans.second + d; i++) {
			if (x[i] - x[ans.second] == ans.first) {
				cout << ans.second << " " << i << endl;
				break;
			}
		}
	}

	return 0;
}