#include "bits/stdc++.h"
using namespace std;
#define FOR(i,j,k) for(int (i)=(j);(i)<(int)(k);++(i))
#define rep(i,j) FOR(i,0,j)
#define each(x,y) for(auto &(x):(y))
#define mp make_pair
#define mt make_tuple
#define all(x) (x).begin(),(x).end()
#define debug(x) cout<<#x<<": "<<(x)<<endl
#define smax(x,y) (x)=max((x),(y))
#define smin(x,y) (x)=min((x),(y))
#define MEM(x,y) memset((x),(y),sizeof (x))
#define sz(x) (int)(x).size()
#define pb push_back
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<ll> vll;

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);

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

        int ma = -INT_MAX, l = 0, r = 0;

        vi x(N);
        rep(i, N)cin >> x[i];

        // value, day
        set<pii> st;
        rep(i, N) {
            if(i > 0) {
                int y = st.begin()->first;
                if(ma < x[i] - y) {
                    ma = x[i] - y;
                    l = st.begin()->second;
                    r = i;
                }
            }

            st.insert(mp(x[i], i));
            if(i >= D) {
                st.erase(mp(x[i - D], i - D));
            }
        }

        ll ans = (ll)ma * K;
        if(ans <= 0)cout << 0 << endl;
        else cout << ans << endl << l << ' ' << r << endl;
    }

}