#include <algorithm>
#include <bitset>
#include <cassert>
#include <cfloat>
#include <climits>
#include <cmath>
#include <complex>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <fstream>
#include <functional>
#include <iomanip>
#include <iostream>
#include <list>
#include <map>
#include <memory>
#include <numeric>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <utility>
#include <vector>

// c++11
#include <array>
#include <tuple>
#include <unordered_map>
#include <unordered_set>

#define mp make_pair
#define mt make_tuple
#define rep(i, n) for (int i = 0; i < (n); i++)

using namespace std;

using ll = long long;
using ull = unsigned long long;
using pii = pair<int, int>;

const int INF = 1 << 29;
const double EPS = 1e-9;
const ll MOD = 1000000007;

const int dx[] = {1, 0, -1, 0}, dy[] = {0, -1, 0, 1};
int N,D,K;
vector<int> X;
int main() {
  cin >> N >> D >> K;
  X.resize(N);
  for (auto &val : X){
    cin >> val;
  }
  ll res = 0;
  priority_queue<pii, vector<pii>, greater<pii>> pque;
  set<int> deleted;
  pii d(INF, INF);
  for (int i = 0; i < N; i++){
    int val = X[i];
    int buy_val,idx;
    buy_val = INF;
    idx = -1;
    while (not pque.empty()){
      pii p = pque.top();
      idx = p.second;
      if (deleted.count(idx)){
        pque.pop();
        continue;
      }
      buy_val = p.first;
      break;
    }
    ll tmp = (ll)(val - buy_val) * K;
    if (tmp > 0 and tmp >= res){
      if (tmp > res){
        d = mp(idx, i);
      }else if (tmp == res){
        d = min(d, mp(idx, i));
      }
      res = tmp;
    }
    if (i - D >= 0){
      deleted.emplace(i - D);
    }
    pque.emplace(mp(val, i));
  }
  cout << res << endl;
  if (res != 0){
    cout << d.first << " " << d.second << endl;
  }
  return 0;
}