Cod sursa(job #2701998)

Utilizator VladPislaruPislaru Vlad Rares VladPislaru Data 2 februarie 2021 15:49:27
Problema Secventa Scor 60
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 1.33 kb
#include <bits/stdc++.h>

using namespace std;

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

int n , k , a[500001];
char s[3800000];
deque <int> q;

int p , M;
int main()
{
    int i , x,semn = 0, j = 0;
    fin >> n >> k;
    fin.get();
    fin.getline(s,3800000);
    for (i = 0; s[i]; )
    {
        if (s[i] == ' ') i++;
        else if (s[i] == '-')
        {
            semn = 1;
            i++;
        }
        else if (isdigit(s[i]))
        {
            x = 0;
            while (isdigit(s[i]))
            {
                x = x * 10 + s[i] - '0';
                i++;
            }
            if (semn == 1)
                a[++j] = -x;
            else a[++j] = x;
            semn = 0;
        }
    }
     for (i = 1;i <= k;i++)
    {
        x = a[i];
        while (!q.empty() && a[q.back()] >= x)
            q.pop_back();
        q.push_back(i);
    }
    M = a[q.front()];
    p = i;
    for (i = k + 1;i <= n;i++)
    {
        x = a[i];
        while (!q.empty() && a[q.back()] >= x)
            q.pop_back();
        q.push_back(i);
        if (i - k >= q.front()) q.pop_front();
        if (M < a[q.front()])
        {
            M = a[q.front()];
            p = i;
        }
    }
    fout << p - k + 1 << " " << p << " " << M;
    return 0;
}