Cod sursa(job #1803406)

Utilizator andreigasparoviciAndrei Gasparovici andreigasparovici Data 11 noiembrie 2016 13:36:11
Problema Secventa Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 2.51 kb
#include <iostream>
#include <cstdio>
#include <climits>
using namespace std;

int n,k;
int maxim=INT_MIN;
int a[5000001],sfarsit;

class Deque
{
private:
    int inc,sf;
    long long int arr[5000001];
public:
    Deque()
    {
        inc=sf=0;
    }
    void adauga_sfarsit(int x)
    {
        arr[sf]=x;
        sf++;
    }
    int prim()
    {
        return arr[inc];
    }
    int ultim()
    {
        return arr[sf-1];
    }
    void scoate_prim()
    {
        inc++;
    }
    void scoate_ultim()
    {
        sf--;
    }
    bool vida()
    {
        return sf-inc==0;
    }
}d;
class Citire
{
private:
    char *b;
    int sp;

    char read_ch() {
        ++sp;
        if (sp == 4096) {
            sp = 0;
            fread(b, 1, 4096, stdin);
        }
        return b[sp];
    }

public:
    Citire() {
        b = new char[4096]();
        sp = 4095;
    }

    Citire& operator >> (int &n) {
        char c;
        while (!isdigit(c = read_ch()) && c != '-');
        int sgn = 1;
        if (c == '-') {
            n = 0;
            sgn = -1;
        } else {
            n = c - '0';
        }
        while (isdigit(c = read_ch())) {
            n = 10 * n + c - '0';
        }
        n *= sgn;
        return *this;
    }

    Citire& operator >> (long long &n) {
        char c;
        n = 0;
        while (!isdigit(c = read_ch()) && c != '-');
        long long sgn = 1;
        if (c == '-') {
            n = 0;
            sgn = -1;
        } else {
            n = c - '0';
        }
        while (isdigit(c = read_ch())) {
            n = 10 * n + c - '0';
        }
        n *= sgn;
        return *this;
    }
};

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

    d.adauga_sfarsit(1);

    for(int i=2;i<k;i++)
    {
        while(!d.vida() && a[d.ultim()]>a[i])
            d.scoate_ultim();
        d.adauga_sfarsit(i);
    }

    for(int i=k;i<=n;i++)
    {
        if(!d.vida() && d.prim()<=i-k)
                d.scoate_prim();
        while(!d.vida() && a[d.ultim()]>a[i])
                d.scoate_ultim();
        d.adauga_sfarsit(i);

        if(a[d.prim()]>maxim && i>=k-1)
        {
            maxim=a[d.prim()];
            sfarsit=i;
        }
    }

    printf("%d %d %d\n",sfarsit-k+1,sfarsit,maxim);
}

int main()
{
    freopen("secventa.in","r",stdin);
    freopen("secventa.out","w",stdout);
    solve();
    return 0;
}