Cod sursa(job #2767683)

Utilizator pielevladutPiele Vladut Stefan pielevladut Data 7 august 2021 13:35:20
Problema Secventa Scor 0
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 1.22 kb
#include <bits/stdc++.h>

using namespace std;

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

int n, k;
int v[500500];
int dq[500500];
int lg[500500];
int dreapta[500500];
int stanga[500500];
int st = 0, dr = -1;

int main()
{
    fin >> n >> k;
    for(int i = 1; i <= n; i ++)
    {
        fin >> v[i];
    }
    v[n + 1] = -33333;
    for(int i = 1; i <= n + 1; i ++)
    {
        while(st <= dr && v[dq[dr]] > v[i])
        {
            dreapta[dq[dr]] = i - 1;
            dr--;
        }
        dq[++dr] = i;
    }
    v[0] = -33333;
    st = 0;
    dr = -1;
    for(int i = n; i >= 0; i --)
    {
        while(st <= dr && v[dq[dr]] > v[i])
        {
            stanga[dq[dr]] = i + 1;
            dr--;
        }
        dq[++dr] = i;
    }
    int minim = 0;
    int posdr = 0, posst = 0;
    for(int i = 1; i <= n; i ++)
    {
        if(stanga[i] && dreapta[i] && dreapta[i] - stanga[i] + 1 >= k)
        {
            if(v[i] > minim)
            {
                minim = v[i];
                posst = stanga[i];
                posdr = dreapta[i];
            }
        }
    }
    fout << posst << ' ' << posdr << ' ' << minim << '\n';
    return 0;
}