#include<bits/stdc++.h>
#define FL(i,a,b) for(ll i=(a);i<=(b);i++)
#define FR(i,a,b) for(ll i=(a);i>=(b);i--)
#define ll long long
#define PII pair<ll,ll>
using namespace std;
const ll MAXN = 1e5 + 10;
ll a[MAXN],q[MAXN];
PII pos;
signed main(){
	ll n,D,K,ans=0;
	scanf("%lld%lld%lld",&n,&D,&K);
	FL(i,1,n) scanf("%lld",&a[i]);
	ll l=1,r=0;
	FL(i,1,n){
		while(l<=r&&i-q[l]>D) l++;
		while(l<=r&&a[q[r]]>a[i]) r--;
		if(l<=r){
			ll res=(a[i]-a[q[l]])*K;
			if(res>ans){
				ans=res;
				pos={q[l],i};
			}
		}
		q[++r]=i;
	}
	if(!ans) puts("0"),exit(0);
	printf("%lld\n",ans);
	printf("%lld %lld\n",pos.first-1,pos.second-1);
}