#include<stdio.h>
#include <iostream>
#include <cstring>
#include <math.h>
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)

int main(){
	
	//while(1){
		
		int n,d,k;
		cin>>n>>d>>k;

		int *x;
		x=new int[n];
		rep(i,n){
			cin>>x[i];
		}
		int max=0;
		int i1,j1;

		rep(i,n-1){
			rep(j,d){
				if( x[i+j+1]-x[i] > max){
					max=x[i+j+1]-x[i];
					i1=i;j1=j;
				}
			}
		}
		if(max==0){
			cout<<0<<endl;
			return 0;
		}
		//cout<<max<<endl;
		long long MAX=max*k;
		cout<<MAX<<endl;
		cout<<i1<<" "<<i1+j1+1<<endl;

		//cin>>n;
		
	//}

	
	return 0;
}