#include<bits/stdc++.h>
using namespace std;
typedef long long LL;

struct cww{cww(){
    ios::sync_with_stdio(false);cin.tie(0);
}}star;
#define fin "\n"
#define FOR(i,bg,ed) for(int i=(bg);i<(ed);i++)
#define REP(i,n) FOR(i,0,n)
#define fi first
#define se second
#define pb push_back
#define DEBUG if(0)
template <typename T>inline void chmin(T &l,T r){l=min(l,r);}
template <typename T>inline void chmax(T &l,T r){l=max(l,r);}
template <typename T>
istream& operator>>(istream &is,vector<T> &v){
    for(auto &it:v)is>>it;
    return is;
}
int deq[2123456];
int main(){
    LL N,D,K;
    cin>>N>>D>>K;
    vector<LL> x(N);
    cin>>x;
    using T=tuple<LL,int,int>;
    T res=T(0,0,0);
    int s=0,t=0;
    REP(i,N){
        while(s<t&&i-deq[s]>D)s++;
        while(s<t&&x[deq[t-1]]>x[i])t--;
        deq[t++]=i;
        chmin(res,T(x[deq[s]]-x[i],deq[s],i));
    }
    LL val;
    tie(val,s,t)=res;
    cout<<val*-K<<endl;
    if(val)cout<<s<<" "<<t<<endl;
    return 0;
}