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Cod sursa(job #799622)
# include <fstream>
# define NMAX 500005
# define MAX_VALUE 505
using namespace std;
ifstream fin("secventa.in");
ofstream fout("secventa.out");
int n, k;
int deque[NMAX], a[NMAX];
int p, q;
int st, dr;
int pmax;
int poz;
int main()
{
int i;
pmax = - MAX_VALUE;
fin >> n >> k;
for(i = 1; i <= n; ++ i) fin >> a[i];
p = 1, q = 0;
for(i = 1; i <= n; ++ i)
{
while(p <= q && a[i] <= a[deque[q]]) -- q;
deque[++ q] = i;
if(i >= k)
if(pmax <= a[deque[p]]) pmax = a[deque[p]], poz = i;
if(i-k == deque[p]) ++ p;
}
fout << poz-k+1 << " " << poz << " " << pmax << "\n";
return 0;
}