#include <bits/stdc++.h>
#define FOR(i,a,b) for (int i=(a);i<(b);i++)
#define FORR(i,a,b) for (int i=(a);i>=(b);i--)
#define pb push_back

using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef set<int> si;
const int inf = 1e9;
const int mod = 1e9+7;

set<pii> s;
int n, d, k, x[100000];
main(){
  cin.tie(0);
  ios::sync_with_stdio(false);
  cin >> n >> d >> k;
  d++;
  int m[3];
  m[0] = -1;
  FOR(i, 0, n){
    cin >> x[i];
    s.insert(pii(x[i], i));
    if(i - d >= 0) s.erase(pii(x[i - d], i - d));
    set<pii>::iterator itr = s.begin();
    if(m[0] < x[i] - itr->first){
      m[0] = x[i] - itr->first;
      m[1] = itr->second;
      m[2] = i;
    }
  }
  cout << k * m[0] << endl;
  if(m[0] > 0) cout << m[1] << " " << m[2] << endl;
}