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Cod sursa(job #522933)
//#include<stdio.h>
#include<fstream>
#define LMAX 500100
ifstream fin("secventa.in");
oftream fout("secventa.out");
int n,k;
int x[LMAX],q[LMAX];
using namespace std;
void read()
{
int i;
//freopen("secventa.in","r",stdin);
//freopen("secventa.out","w",stdout);
//scanf("%d%d",&n,&k);
fin>>n>>k;
for(i=1;i<=n;i++)
fin>>x[i];
}
void solve()
{
int p=1,u=0,i,poz,max=poz=-(1<<25);
for(i=1;i<=n;i++)
{
while(p<=u && x[i]<=x[q[u]])
u--;
q[++u]=i;
if(q[p]+k==i)
p++;
if(i>=k)
if(x[q[p]]>max)
max=x[q[p]],poz=i;
}
//printf("%d %d %d",poz-k+1,poz,max);
fout<<poz-k+1<<" "<<poz<<" "<<max;
}
int main()
{
read();
solve();
return 0;
}