#include<stdio.h>

long long x[100000];

int main(int argc, char const *argv[]){
	long long n,d,k,i,c,max=0,sell,min_i,f=1;
	scanf("%lld %lld %lld",&n,&d,&k);
	for(i=0;i<n;i++){
		scanf("%lld",&x[i]);
	}
	i=n-1;
	while(i>0){
		for(c=f;c<=d;c++){
			if(i-c<0) break;
			if(max<=x[i]-x[i-c]){
				min_i=i-c;
				sell=i;
				max=x[i]-x[i-c];
			}
			if(x[i-c]>=x[i]){
				i=i-c+1;
				break;
			}
		}
		if(c==d+1) f=d;
		else f=1;
		i--;
	}
	if(max==0) printf("0\n");
	else printf("%lld\n%lld %lld\n",max*k,min_i,sell);
	return 0;
}