Cod sursa(job #2477611)

Utilizator doru.nituNitu Doru Constantin doru.nitu Data 20 octombrie 2019 19:37:00
Problema Secventa Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 1.68 kb
//https://infoarena.ro/problema/secventa

#include <fstream>
#include <deque>
using namespace std;

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

struct secventa
{
    int minim;
    int incp;
    int sfar;

};

deque<int> q;
secventa sec_max;
int nr[500005];

#define dim 8192
char ax[dim];
int pz;

inline void cit(int &x)
{
       x = 0;
       int ms = 1;
       while(ax[pz]  < '0' || ax[pz] > '9')
       {
         if(ax[pz] == '-') ms = -1;
         if(++pz == dim) in.read(ax,dim),pz = 0;
       }

        while(ax[pz] >= '0' && ax[pz] <= '9')
       {
              x  = x * 10 + ax[pz] - '0';
              if(++pz == dim) in.read(ax,dim),pz = 0;
       }

       x= x*ms;
}

void add_q(int x)
{
    while(!q.empty() && nr[q.back()] > nr[x])
        q.pop_back();

    q.push_back(x);
}

void update_secv_max(secventa aux)
{
    if(sec_max.incp == 0)
    {
        sec_max = aux;
    }
    else
    if(aux.minim > sec_max.minim)
    {
        sec_max = aux;
    }
}

int main()
{
    int n, k;
    cit(n);
    cit(k);

    for(int i=1; i<=n; i++)
        cit(nr[i]);

    for(int i = 1; i<k; ++i)
    {
        add_q(i);
    }

    for(int i = k; i <= n; ++i)
    {
        // pe cine eliminam
        int poz_elim = i-k;

        if(poz_elim == q.front())
            q.pop_front();

        add_q(i);

        secventa aux;
        aux.incp = i-k+1;
        aux.sfar = i;
        aux.minim = nr[q.front()];

        update_secv_max(aux);
    }

    out<<sec_max.incp <<" ";
    out<<sec_max.sfar <<" ";
    out<<sec_max.minim <<"\n";



    in.close();
    out.close();
    return 0;
}