#include <cassert>
#include <cmath>
#include <algorithm>
#include <iostream>
#include <iomanip>
#include <climits>
#include <map>
#include <queue>
#include <set>
#include <cstring>
#include <vector>

using namespace std;
typedef long long ll;

struct Node {
  int day;
  int x;

  Node(int day = -1, int x = -1) {
    this->day = day;
    this->x = x;
  }

  bool operator>(const Node &n) const {
    return x > n.x;
  }
};

int main() {
  int N, D, K;
  cin >> N >> D >> K;

  priority_queue <Node, vector<Node>, greater<Node>> pque;
  int X[N];
  for (int i = 0; i < N; ++i) {
    cin >> X[i];
  }
  pque.push(Node(0, X[0]));
  int ans = 0;
  int j = -1;
  int k = -1;

  for (int day = 1; day <= N - 1; ++day) {
    int x = X[day];

    while (day - pque.top().day > D) {
      pque.pop();
    }

    int diff = x - pque.top().x;
    if (ans < diff * K) {
      ans = diff * K;
      j = pque.top().day;
      k = day;
    }

    pque.push(Node(day, x));
  }

  if (ans == 0) {
    cout << 0 << endl;
  } else {
    cout << ans << endl;
    cout << j << " " << k << endl;
  }

  return 0;
}