#include <stdio.h>    
long long i,n,k,x[50000],s[500000],min[50000],mm,a,b;
int main(){
    FILE*f=fopen("secv2.in","r");
    FILE*g=fopen("secv2.out","w");

    fscanf(f,"%lld %lld %lld",&n,&k,&x[1]);

    s[1] = x[1];
    min[1] = 1;


    for(i=2;i<=n;i++){

	fscanf(f,"%lld",&x[i]);
	s[i] = s[i-1] + x[i];

	if(s[i]<s[min[i-1]]) min[i] = i;
	else min[i] = min[i-1];

    }
    mm = s[k];
    for(i=1;i<=n;i+=k)
       if(s[i] - s[min[i-1]] > mm){ a=min[i-1]+1;b=i;mm=s[i] - s[min[i-1]];}

    fprintf(g,"%lld %lld %lld",a,b,mm);

   return 0;
}