Cod sursa(job #2039781)

Utilizator stefanst77Luca Stefan Ioan stefanst77 Data 14 octombrie 2017 22:05:26
Problema Secventa Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.25 kb
#include <bits/stdc++.h>

using namespace std;

ifstream fin ("secventa.in");
ofstream fout ("secventa.out");

int n, k;
int a[500007];
deque <int> q;
int pozinceput, pozfinal, valmax;

void Citire()
{
    fin >> n >> k;
    for (int i=1; i<=n; i++)
        fin >> a[i];
}

void Rezolvare()
{
    int i;
    /// adaugam pana la k in vector valorile cele mai mare, in ordine cresc.
    for (i=1; i<=k; i++)
    {
        while (!q.empty() && a[i]<a[q.empty()])
            q.pop_back();
        q.push_back(i);
    }
    ///initializam
    valmax=a[q.front()];
    pozfinal=q.back();
    pozinceput=pozfinal - k + 1;

    for (i=k+1; i<=n; i++)
    {
        ///actualizam maximul
        while (!q.empty() && a[i]<a[q.empty()])
            q.pop_back();
        q.push_back(i);

        /// verificam validarea
        if (q.front() < i-k+1 && !q.empty())
            q.pop_front();

        /// actualizam raspunsurile
        if (valmax < a[q.front()])
        {
            valmax=a[q.front()];
            pozfinal=q.back();
            pozinceput = pozfinal - k + 1;
        }
    }
}

int main()
{
    Citire();
    Rezolvare();
    fout << pozinceput << " " << pozfinal << " " << valmax << "\n";
    return 0;
}