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Cod sursa(job #277558)
#include <stdio.h>
int n,k,p,u,a[500001],x,y,max=-20000000,d[500001],i;
int main()
{
freopen("secventa.in","r",stdin);
freopen("secventa.out","w",stdout);
scanf("%d %d", &n, &k);
for (i=1;i<=n;i++)
scanf("%d", &a[i]);
p=1; u=0;
for (i=1;i<=n;i++)
{
while (p<=u && a[i]<=a[d[u]])
u--;
d[++u]=i;
if (d[p]==i-k) p++;
if (i>=k)
if (a[d[p]]>max)
{
max=a[d[p]];
x=i-k+1;
y=i;
}
}
printf("%d %d %d", x, y, max);
return 0;
}