#include <sstream>
#include <iostream>
#include <algorithm>
#include <deque>
#include <string>

using namespace std;

typedef long long ll;

ll x[100005];
ll maximum[100005];
ll maximum2[100005];

int main() {

	int N, D;

	ll K;

	scanf("%d %d %lld", &N, &D, &K);

	for (int i = 0; i < N; i++) {
		scanf("%lld", &x[i]);
	}

	deque<ll> nums;

	int cnt = 0;

	while (!nums.empty()) {
		nums.pop_back();
	}

	for (int i = 0; i < N; i++) {
		while (!nums.empty() && x[i] > nums.back()) {
			nums.pop_back();
		}
		nums.push_back(x[i]);
		if (i >= D && nums.front() == x[i - D]) {
			nums.pop_front();
		}
		if (i >= D - 1) {
			maximum[cnt] = nums.front();
			cnt++;
		}

	}

	int cnt2 = 0;

	ll ma = x[N - 1];

	for (int i = N - 2;; i--) {
		if (cnt2 >= D) {
			break;
		}
		maximum2[i] = ma;
		ma = max(ma, x[i]);
		cnt2++;
	}

	ma = 0ll;

	ll ans_max, ans_min;

	for (int i = 0; i < cnt - 1; i++) {
		if (ma < maximum[i + 1] - x[i]) {
			ma = maximum[i + 1] - x[i];
			ans_max = maximum[i + 1];
			ans_min = x[i];
		}
	}

	for (int i = cnt-1; i < N - 1; i++) {
		if (ma < maximum2[i] - x[i]) {
			ma = maximum2[i] - x[i];
			ans_max = maximum2[i];
			ans_min = x[i];
		}
	}
	cout << ma*K << endl;

	if (ma != 0ll) {

		int ansj, ansk;

		for (int i = 0; i < N - 1; i++) {
			for (int j = i + 1; j < N; j++) {
				if (j - i <= D) {
					if (ans_min == x[i] && ans_max==x[j]) {
						printf("%d %d\n",i,j);
						return 0;
					}
				}
				else {
					break;
				}
			}
		}
	}

	return 0;
}