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Cod sursa(job #298924)
using namespace std;
#include<cstdio>
#define nmax 500001
#define inf 0x3f3f3f3f
int v[nmax],s,f,max,in,n,k,a[nmax];
void read()
{
int i;
freopen("secventa.in","r",stdin);
scanf("%d%d",&n,&k);
for(i=1;i<=n;i++)
scanf("%d",&a[i]);
}
int main()
{
read();
s=1;f=1;int i;
v[s]=1;
for(i=2;i<k;i++)
{
while(s<=f && a[i]<=a[v[f]]) f--;
v[++f]=i;
}
max=-inf;
for(i=k;i<=n;i++)
{
while(s<=f && a[i]<=a[v[f]]) f--;
v[++f]=i;
while(s<=f && v[s]<i-k+1) s++;
if(a[v[s]]>max)
{
max=a[v[s]];
in=v[s];
}
}
freopen("secventa.out","w",stdout);
printf("%d %d %d\n",in,in+k-1,max);
return 0;
}