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Cod sursa(job #514451)
#include <cstdio>
using namespace std;
const int N=500005;
int v[N],dq[N],n,k,st,dr;
void dreapta(int i)
{
while(st<=dr && v[dq[dr]]>=v[i])
--dr;
}
void adauga(int i)
{
dq[++dr]=i;
}
void stanga(int i)
{
if(dq[st]==i)
++st;
}
int main()
{
freopen("secventa.in","r",stdin);
freopen("secventa.out","w",stdout);
int i,poz1,poz2,max;
scanf("%d%d",&n,&k);
for(i=1;i<=n;i++)
scanf("%d",&v[i]);
st=1;
dr=0;
max=-40000;
for(i=1;i<=k;i++)
{
dreapta(i);
dq[++dr]=i;
}
for(;i<=n;i++)
{
dreapta(i);
adauga(i);
stanga(i-k);
if (v[dq[st]]>max)
{
max=v[dq[st]];
poz1=i-k+1;
poz2=i;
}
}
printf("%d %d %d",poz1,poz2,max);
return 0;
}